diff --git a/day17.py b/day17.py
new file mode 100644
index 0000000..23f1902
--- /dev/null
+++ b/day17.py
@@ -0,0 +1,140 @@
+from tools.aoc import AOCDay
+from typing import Any
+
+
+ROCK_SHAPES = [
+    ["####"],
+    [' # ', '###', ' # '],
+    ['  #', '  #', '###'],
+    ['#', '#', '#', '#'],
+    ['##', '##']
+]
+
+
+class Chamber(list):
+    def hash(self):
+        max_len = min(30, len(self) - 1)
+        return "".join(self[i] for i in range(max_len))
+
+
+def collide_hor(chamber: list, rock_shape:list, rock_x: int, rock_y: int) -> bool:
+    if rock_x < 0 or rock_x > 7 - len(rock_shape[0]):
+        return True
+
+    for i, line in enumerate(rock_shape):
+        for x, c in enumerate(rock_shape[i]):
+            if c == ' ':
+                continue
+            y = rock_y - ((len(rock_shape) - 1) - i)
+            if y < 0:
+                continue
+            if chamber[y][rock_x + x] == '#':
+                return True
+
+    return False
+
+
+def settles(chamber: list, rock_shape: list, rock_x: int, rock_y: int) -> bool:
+    for i, c in enumerate(rock_shape[-1]):
+        if c == ' ':
+            continue
+        if rock_y >= -1 and chamber[rock_y + 1][i + rock_x] == '#':
+            return True
+
+    if rock_shape[-1] == ' # ':
+        for i, c in enumerate(rock_shape[-2]):
+            if c == ' ':
+                continue
+            if rock_y > -1 and chamber[rock_y][i + rock_x] == '#':
+                return True
+
+    return False
+
+
+def drop_rock(chamber: list, rock_shape: list, jet: list, jet_index: int) -> int:
+    jet_len = len(jet)
+    rock_index_x = 2
+    for i in range(4):
+        rock_index_x += jet[(jet_index + i) % jet_len]
+        if not (0 <= rock_index_x <= 7 - len(rock_shape[0])):
+            rock_index_x = 0 if rock_index_x < 0 else 7 - len(rock_shape[0])
+    jet_index = (jet_index + 4) % jet_len
+    rock_index_y = -1
+    while not settles(chamber, rock_shape, rock_index_x, rock_index_y):
+        rock_index_y += 1
+        if not collide_hor(chamber, rock_shape, rock_index_x + jet[jet_index], rock_index_y):
+            rock_index_x += jet[jet_index]
+        jet_index = (jet_index + 1) % jet_len
+
+    for i in range(len(rock_shape) - 1, -1, -1):
+        y = rock_index_y + i - len(rock_shape) + 1
+        if y < 0:
+            chamber.insert(0, '       ')
+            y = 0
+        left = chamber[y][:rock_index_x]
+        middle = "".join(
+            "#" if rock_shape[i][x] == '#' or chamber[y][rock_index_x + x] == '#' else ' '
+            for x in range(len(rock_shape[i]))
+        )
+        right = chamber[y][rock_index_x + len(rock_shape[i]):]
+        chamber[y] = left + middle + right
+
+    return jet_index
+
+
+class Day(AOCDay):
+    inputs = [
+        [
+            (3068, "input17_test"),
+            (3059, "input17"),
+        ],
+        [
+            (1514285714288, "input17_test"),
+            (1500874635587, "input17"),
+        ]
+    ]
+
+    def get_jet_pattern(self) -> list:
+        return [-1 if x == '<' else 1 for x in self.getInput()]
+
+    def part1(self) -> Any:
+        chamber = ['#######']
+        jet = self.get_jet_pattern()
+        jet_index = 0
+        for rock_fall in range(2022):
+            jet_index = drop_rock(chamber, ROCK_SHAPES[rock_fall % 5], jet, jet_index)
+
+        return len(chamber) - 1
+
+    def part2(self) -> Any:
+        chamber = Chamber(['#######'])
+        jet = self.get_jet_pattern()
+        jet_index = drop_rock(chamber, ROCK_SHAPES[0], jet, 0)
+        rock_index = 1
+        cycle = 1
+        cycle_cache = {}
+        while (jet_index, rock_index, chamber.hash()) not in cycle_cache:
+            cycle_cache[(jet_index, rock_index, chamber.hash())] = (cycle, len(chamber) - 1)
+            jet_index = drop_rock(chamber, ROCK_SHAPES[rock_index], jet, jet_index)
+            rock_index = (rock_index + 1) % 5
+            cycle += 1
+
+        cycle_start, cycle_start_len = cycle_cache[(jet_index, rock_index, chamber.hash())]
+        cycle_height = len(chamber) - 1 - cycle_start_len
+        cycle_len = cycle - cycle_start
+
+        chamber = Chamber(['#######'])
+        jet_index = 0
+        rock_index = 0
+        bottom_part = 1_000_000_000_000 % cycle_len
+        for _ in range(cycle_len + bottom_part):
+            jet_index = drop_rock(chamber, ROCK_SHAPES[rock_index % 5], jet, jet_index)
+            rock_index += 1
+        cur_len = len(chamber) - 1 - cycle_height
+
+        return (1_000_000_000_000 // cycle_len * cycle_height) + cur_len
+
+
+if __name__ == '__main__':
+    day = Day(2022, 17)
+    day.run(verbose=True)
diff --git a/inputs/input17 b/inputs/input17
new file mode 100644
index 0000000..b2f8a7a
--- /dev/null
+++ b/inputs/input17
@@ -0,0 +1 @@
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diff --git a/inputs/input17_test b/inputs/input17_test
new file mode 100644
index 0000000..fb5d89e
--- /dev/null
+++ b/inputs/input17_test
@@ -0,0 +1 @@
+>>><<><>><<<>><>>><<<>>><<<><<<>><>><<>>
\ No newline at end of file