#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+0; }else{ cout << "Input Error!"; } cout << "\n"; if(b > 32 && b < 126){ cout << b+ 0; }else{ cout << "Input Error!"; } // cout << a << " " << b; return 0; }