#include<bits/stdc++.h> using namespace std; int main(){ char a; scanf("%c",&a); if(a-1>=32&&a-1<=126) { cout <<a-1 <<endl; }else{ cout <<"Input Error!" <<endl; } if(a+1>=32&&a+1<=126){ cout <<a+1 <<endl; }else{ cout <<"Input Error!" <<endl; } return 0; }