# Note, there are a lot of ways to do this.
# This just happens to be the way I wrote my solution

def decode(iFile,oFile):
    fin = open(iFile,"r")
    contents = fin.read()
    
    fout = open(oFile,"w")
    
    index = 0
    while index<len(contents):
        nextLetter = contents[index]
        fout.write(nextLetter)
        
        if nextLetter>="a" and nextLetter<="z":
            skip = ord(nextLetter)-ord("a")+1
            
        elif nextLetter>="A" and nextLetter<="Z":
            skip = ord(nextLetter)-ord("A")+1
            
        elif nextLetter>="0" and nextLetter<="9":
            skip = int(nextLetter)
            
        else:
            skip = 8
            
        index = index + skip + 1
        
    fout.close()
    fin.close()