diff --git a/day16.py b/day16.py
index 9e6cf84..a4ebe13 100644
--- a/day16.py
+++ b/day16.py
@@ -3,6 +3,8 @@ from itertools import product
 from tools.aoc import AOCDay
 from typing import Any
 
+from tools.tools import Cache
+
 
 class Valve:
     def __init__(self, name: str, flowrate: int):
@@ -120,10 +122,12 @@ class Day(AOCDay):
     inputs = [
         [
             (1651, "input16_test"),
+            (1947, "input16_dennis"),
             (1850, "input16"),
         ],
         [
             (1707, "input16_test"),
+            (2556, "input16_dennis"),
             (2306, "input16"),
         ]
     ]
@@ -168,8 +172,9 @@ class Day(AOCDay):
         return get_max_flow(self.get_valve_graph(), [])
 
     def part2(self) -> Any:
+        cache = Cache()
         root = self.get_valve_graph()
-        return get_max_flow_double(root, root, [], {})
+        return get_max_flow_double(root, root, [], cache)
 
 
 if __name__ == '__main__':
diff --git a/inputs/input16_dennis b/inputs/input16_dennis
new file mode 100644
index 0000000..2d17b41
--- /dev/null
+++ b/inputs/input16_dennis
@@ -0,0 +1,61 @@
+Valve RT has flow rate=0; tunnels lead to valves EN, LZ
+Valve VB has flow rate=0; tunnels lead to valves SZ, BF
+Valve AD has flow rate=0; tunnels lead to valves EB, JF
+Valve RE has flow rate=4; tunnels lead to valves QB, IF, XT, WF, KW
+Valve RL has flow rate=0; tunnels lead to valves DQ, LZ
+Valve OK has flow rate=0; tunnels lead to valves QH, BF
+Valve RV has flow rate=0; tunnels lead to valves IU, JF
+Valve TE has flow rate=0; tunnels lead to valves HE, XF
+Valve WW has flow rate=0; tunnels lead to valves QH, YZ
+Valve HB has flow rate=15; tunnel leads to valve OM
+Valve IY has flow rate=14; tunnels lead to valves UH, KW, BN, LW, UY
+Valve QF has flow rate=0; tunnels lead to valves JF, PL
+Valve YZ has flow rate=0; tunnels lead to valves JG, WW
+Valve QB has flow rate=0; tunnels lead to valves SP, RE
+Valve SO has flow rate=0; tunnels lead to valves QH, SZ
+Valve EB has flow rate=7; tunnels lead to valves IF, NH, AD, VI, DQ
+Valve VL has flow rate=0; tunnels lead to valves JF, YV
+Valve BF has flow rate=18; tunnels lead to valves OK, VB, OH, SX
+Valve UC has flow rate=0; tunnels lead to valves SC, YV
+Valve OQ has flow rate=0; tunnels lead to valves XT, AA
+Valve YV has flow rate=6; tunnels lead to valves YX, TT, VL, UC, NH
+Valve KJ has flow rate=0; tunnels lead to valves OH, JG
+Valve QH has flow rate=20; tunnels lead to valves SO, OK, WW
+Valve KW has flow rate=0; tunnels lead to valves RE, IY
+Valve PL has flow rate=0; tunnels lead to valves JG, QF
+Valve DQ has flow rate=0; tunnels lead to valves EB, RL
+Valve AA has flow rate=0; tunnels lead to valves YI, EN, UK, OQ, VI
+Valve XT has flow rate=0; tunnels lead to valves OQ, RE
+Valve SZ has flow rate=24; tunnels lead to valves VB, SO
+Valve IU has flow rate=25; tunnels lead to valves RV, HE, HQ
+Valve OM has flow rate=0; tunnels lead to valves NY, HB
+Valve YX has flow rate=0; tunnels lead to valves YV, SI
+Valve SX has flow rate=0; tunnels lead to valves ZB, BF
+Valve KD has flow rate=0; tunnels lead to valves XF, LW
+Valve SP has flow rate=0; tunnels lead to valves XF, QB
+Valve UY has flow rate=0; tunnels lead to valves UK, IY
+Valve XF has flow rate=22; tunnels lead to valves SP, TE, KD, NY
+Valve SC has flow rate=0; tunnels lead to valves LZ, UC
+Valve UK has flow rate=0; tunnels lead to valves UY, AA
+Valve LW has flow rate=0; tunnels lead to valves KD, IY
+Valve FL has flow rate=0; tunnels lead to valves BN, LZ
+Valve VI has flow rate=0; tunnels lead to valves AA, EB
+Valve HW has flow rate=0; tunnels lead to valves JF, CY
+Valve YI has flow rate=0; tunnels lead to valves AA, TT
+Valve HE has flow rate=0; tunnels lead to valves IU, TE
+Valve JG has flow rate=10; tunnels lead to valves PL, YZ, SI, KJ
+Valve BN has flow rate=0; tunnels lead to valves IY, FL
+Valve IF has flow rate=0; tunnels lead to valves EB, RE
+Valve JF has flow rate=19; tunnels lead to valves HW, QF, VL, RV, AD
+Valve SI has flow rate=0; tunnels lead to valves JG, YX
+Valve WF has flow rate=0; tunnels lead to valves LZ, RE
+Valve HQ has flow rate=0; tunnels lead to valves IU, UH
+Valve LZ has flow rate=5; tunnels lead to valves SC, FL, WF, RL, RT
+Valve UH has flow rate=0; tunnels lead to valves IY, HQ
+Valve CY has flow rate=21; tunnel leads to valve HW
+Valve NH has flow rate=0; tunnels lead to valves EB, YV
+Valve TT has flow rate=0; tunnels lead to valves YV, YI
+Valve OH has flow rate=0; tunnels lead to valves KJ, BF
+Valve EN has flow rate=0; tunnels lead to valves RT, AA
+Valve NY has flow rate=0; tunnels lead to valves OM, XF
+Valve ZB has flow rate=8; tunnel leads to valve SX
\ No newline at end of file