S=input()
S_new=[]

b={}
for i,alpha in enumerate(["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"]):
    b[alpha]=i+1

for i,s in zip(range(len(S)),S):
    pal=b[s]-i-1
    while(pal<=0):
        pal+=26
    alpha=[k for k, v in b.items() if v == pal]
    S_new.append(alpha[0])
    
print("".join(S_new))