#include<bits/stdc++.h> using namespace std; int main(){ char a; cin >>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; }