#include<iostream> 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; }