#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; }