diff --git a/2019/day7/day7.hs b/2019/day7/day7.hs
index 85bf052..248c380 100644
--- a/2019/day7/day7.hs
+++ b/2019/day7/day7.hs
@@ -2,51 +2,24 @@ import Data.List.Split
 import qualified Data.List as L
 import Data.Vector as V
 import Data.Char
-import Data.Ord
-import Debug.Trace
 import System.Exit
 
 main = do
     content <- readFile "input"
---    let content = "3,23,3,24,1002,24,10,24,1002,23,-1,23,101,5,23,23,1,24,23,23,4,23,99,0,0"
-    --let content = "3,15,3,16,1002,16,10,16,1,16,15,15,4,15,99,0,0"
---    let content = "3,31,3,32,1002,32,10,32,1001,31,-2,31,1007,31,0,33,1002,33,7,33,1,33,31,31,1,32,31,31,4,31,99,0,0,0"
-    --day5 example:
---    let content = "3,21,1008,21,8,20,1005,20,22,107,8,21,20,1006,20,31,1106,0,36,98,0,0,1002,21,125,20,4,20,1105,1,46,104,999,1105,1,46,1101,1000,1,20,4,20,1105,1,46,98,99"
---    part2:
-    let content = "3,26,1001,26,-4,26,3,27,1002,27,2,27,1,27,26,27,4,27,1001,28,-1,28,1005,28,6,99,0,0,5"
     let tape = fromList $ L.concatMap (L.map read . splitOn ",") (lines content)
---    let intseq = [0,1,2,3,4]
-    let intseq = [9,8,7,6,5]
-    let ret = run_amps tape intseq [0]
- --   print $ "Final result:" L.++ (show ret)
---    print $ find_max tape
---    print $ find_max2 input
-    print $ run_amps_feedback tape intseq
+    print $ find_max tape [0..4]
+    print $ find_max tape [5..9]
 
-run_amps t [] prev = prev
-run_amps t (x:xs) prev = run_amps t xs next
-    where (_,_,next,_) = exec_steps ((t,0),x:prev,[],Continue)
-
-run_amps_feedback tape intseq = run_amps_feedback' tms intseq [0]
+run_amps_feedback tape intseq = L.head $ run_amps_feedback' tms intseq [0]
     where tms = L.replicate 5 (tape,0)
-run_amps_feedback' ((t,p):tms) (x:xs) prev =
-    if halt == Halt then tm_out else
-        run_amps_feedback' (tms L.++ [tm_new]) xs tm_out
-    where (tm_new,tm_in,tm_out,halt) = exec_steps ((t,p),x:prev,[],Continue)
---todo: [x] -> x
-run_amps_feedback' ((t,p):tms) [] prev =
-    if halt == Halt then tm_out else
-        run_amps_feedback' (tms L.++ [tm_new]) [] tm_out
-    where (tm_new,tm_in,tm_out,halt) = exec_steps ((t,p),prev,[],Continue)
+run_amps_feedback' ((t,p):tms) intseq prev =
+    if halt == Halt then prev else
+        run_amps_feedback' (tms L.++ [tm_new]) tailseq tm_out
+    where (tm_new,tm_in,tm_out,halt) = exec_steps ((t,p),xprev,[],Continue)
+          tailseq = if L.null intseq then [] else L.tail intseq
+          xprev = if L.null intseq then prev else (L.head intseq):prev
 
-find_max input = L.maximum [(L.head $ run_amps input [a,b,c,d,e] [0], [a,b,c,d,e])
-                 | a<-[0..4], b<-[0..4], c<-[0..4], d<-[0..4], e<-[0..4],
-                 L.nub [a,b,c,d,e] == [a,b,c,d,e]]
-
--- find_max2 input = L.maximum [(L.head $ run_amps_feedback input [a,b,c,d,e] [0] [0,0,0,0,0], [a,b,c,d,e])
---                  | a<-[5..9], b<-[5..9], c<-[5..9], d<-[5..9], e<-[5..9],
---                  L.nub [a,b,c,d,e] == [a,b,c,d,e]]
+find_max tape range = L.maximum [run_amps_feedback tape xs | xs <- L.permutations range]
 
 opl x
     | n`L.elem`"1278"=4
@@ -91,7 +64,7 @@ exec_steps ((t,p),input,val,halt) =
         opvec = slice p command_length t
         (t_new,p_new,cond,input_new,val_new) =
             step opvec (t,p+command_length,input,val) in
-    if cond == Output then ((t_new,p_new),input_new,val_new,cond)
+    if cond == Output || cond == Halt then ((t_new,p_new),input_new,val_new,cond)
         else exec_steps ((t_new,p_new),input_new,val_new,cond)
 
 
diff --git a/2019/day7/input b/2019/day7/input
new file mode 100644
index 0000000..c4d880f
--- /dev/null
+++ b/2019/day7/input
@@ -0,0 +1 @@
+3,8,1001,8,10,8,105,1,0,0,21,38,63,76,93,118,199,280,361,442,99999,3,9,101,3,9,9,102,3,9,9,101,4,9,9,4,9,99,3,9,1002,9,2,9,101,5,9,9,1002,9,5,9,101,5,9,9,1002,9,4,9,4,9,99,3,9,101,2,9,9,102,3,9,9,4,9,99,3,9,101,2,9,9,102,5,9,9,1001,9,5,9,4,9,99,3,9,102,4,9,9,1001,9,3,9,1002,9,5,9,101,2,9,9,1002,9,2,9,4,9,99,3,9,1002,9,2,9,4,9,3,9,1001,9,1,9,4,9,3,9,1001,9,1,9,4,9,3,9,1001,9,1,9,4,9,3,9,1001,9,2,9,4,9,3,9,1002,9,2,9,4,9,3,9,101,2,9,9,4,9,3,9,1002,9,2,9,4,9,3,9,1001,9,1,9,4,9,3,9,101,2,9,9,4,9,99,3,9,102,2,9,9,4,9,3,9,1002,9,2,9,4,9,3,9,1001,9,2,9,4,9,3,9,102,2,9,9,4,9,3,9,101,1,9,9,4,9,3,9,102,2,9,9,4,9,3,9,102,2,9,9,4,9,3,9,1001,9,1,9,4,9,3,9,102,2,9,9,4,9,3,9,1001,9,1,9,4,9,99,3,9,101,1,9,9,4,9,3,9,101,2,9,9,4,9,3,9,1002,9,2,9,4,9,3,9,101,2,9,9,4,9,3,9,1001,9,2,9,4,9,3,9,1002,9,2,9,4,9,3,9,1002,9,2,9,4,9,3,9,102,2,9,9,4,9,3,9,1001,9,1,9,4,9,3,9,1002,9,2,9,4,9,99,3,9,1001,9,1,9,4,9,3,9,102,2,9,9,4,9,3,9,102,2,9,9,4,9,3,9,1002,9,2,9,4,9,3,9,1001,9,2,9,4,9,3,9,102,2,9,9,4,9,3,9,101,2,9,9,4,9,3,9,1002,9,2,9,4,9,3,9,101,1,9,9,4,9,3,9,1001,9,2,9,4,9,99,3,9,1002,9,2,9,4,9,3,9,102,2,9,9,4,9,3,9,101,2,9,9,4,9,3,9,101,1,9,9,4,9,3,9,1002,9,2,9,4,9,3,9,1001,9,2,9,4,9,3,9,102,2,9,9,4,9,3,9,101,1,9,9,4,9,3,9,101,2,9,9,4,9,3,9,1002,9,2,9,4,9,99