#include<iostream> using namespace std; int main() { char ch; ch = cin.get(); if ((ch - 1) >= 32 && (ch - 1) <= 126) cout << ch - 1 << endl; else cout <<"Input Errot!" << endl; if ((ch + 1) >= 32 && (ch + 1) <= 126) cout << ch + 1 << endl; else cout <<"Input Error!" << endl; }