diff --git a/block.py b/block.py
index c3b4efb..832e7ad 100644
--- a/block.py
+++ b/block.py
@@ -1,3 +1,4 @@
+import math
 from lib.input import *
 from lib.vars import alphabet
 from lib.vars import listToString
@@ -19,15 +20,54 @@ def keyToIntTuple(key):
 
 def applyKeyToBlock(keyT, blockL): # function to apply a key to a block
     blockDe = [""] * blockSize
+    if(in_mode == 0):
+        for i in range(blockSize):
+            blockDe[i] = blockL[keyT[i]] # encrypting
+    elif(in_mode == 1):
+        for i in range(blockSize):
+            blockDe[keyT[i]] = blockL[i] # decrypting
 
-    for i in range(blockSize):
-        blockDe[i] = blockL[keyT[i]] 
-    
-    print(blockDe)
     return blockDe
 
+def splitInput(inputL, n):
+    out = []
+    inputLen = len(inputL)
+    x = inputLen / float(n)
+    
+    last = 0.0
+    while last < inputLen:
+        out.append( inputL[ int(last):int(last + x) ] )
+        last += x
+
+    return out
+
+def getOutput(blocksL):
+    out = ""
+    for block in blocksL:
+        out += listToString(block)
+
+    return out
+
+#
+# Do the encrypting/decrypting stuff with the input
+# 
+TXT = list(in_txt)
 KEY = keyToIntTuple(in_key) # define and make the key a tuple so that we can index it
 
-applyKeyToBlock(keyToIntTuple(in_key), list(in_txt))
+amountBlocks = len(TXT) / blockSize
+if( math.floor(amountBlocks) != math.ceil(amountBlocks) ):
+    print("Error: Input didn't match key size.")
+    print("amountBlocks: " + str(amountBlocks))
+    exit()
+
+Blocks = splitInput(TXT, amountBlocks)
+BlocksDe = [None] * len(Blocks) 
+
+count = -1
+for block in Blocks:
+    count += 1
+    BlocksDe[count] = applyKeyToBlock(KEY, block)
+
 
- 
+### Finally print the output
+print( getOutput(BlocksDe) )