#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; }