#include <bits/stdc++.h>
using namespace std;
int main() {
char a, b = 'a', c = 'z', d = 'A', e = 'Z';
while(cin >> a){
if(a <= b && a > c){
cout << a + 1;
}
else if(a <= d && a > e){
cout << a + 1;
}
else if(a == c && a == e){
cout << a - 35;
}
}
return 0;
}
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