strings = list(input())
l = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]
result = ""
for i in range(0, len(strings), 26):
    for i,s in enumerate(strings[i: i+26],1):
        place = l.index(s) - (i)
        result += l[place]
print(result)