inputList = list(map(ord, list(input())))
for i in range(0, len(inputList)):
    ind = i % (ord("Z") - ord("A") + 1)
    inputList[i] -= (ind + 1)
    if (inputList[i] < ord("A")):
        inputList[i] += (1 - ord("A") + ord("Z"))
print(''.join(list(map(chr, inputList))))