s=input("Enter the string:")

s1=""
for i in s :
    if(i.isupper()):
        
        c=ord(i)
        s1=s1+chr((c-3-65)%26+65)
    else:
        c=ord(i)
        s1=s1+chr((c-3-97)%26+97)
print (s1)