#include<bits/stdc++.h> using namespace std; int main() { char n,a,b; cin >> n; a = n - 1; b = n + 1; if(a >= 32 && a <= 126){ cout << a; }else{ cout << "Input Error!"; } if(b >= 32 && b <= 126){ cout << b; }else{ cout << "Input Error!"; } return 0; }