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