alphs=['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']
S = raw_input()
ans=[]

for i in range(len(S)):
    for j in range(len(alphs)):
        if S[i]==alphs[j]:
            p = i
            if p>=len(alphs):
                set = int(p/len(alphs))
                p -= set*len(alphs)
            else:
                pass
            dcrpt = alphs[j-p-1]
            ans.append(dcrpt)
        else:
            continue

print "".join(ans)