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