171207_5598_카이사르 암호

//https://www.acmicpc.net/problem/5598 #include <iostream>

#include <string>

using namespace std;

int main()

{

string s;

cin >> s;

int l=s.size();

for(int i=0;i<l; i++)

{

if(s[i]-'A'<3) cout << (char)(s[i]+23);

else cout << (char)(s[i]-3);

}

}