#include <iostream> #include <string> using namespace std ; int main(){ char ch; ch = cin.get(); if((ch-1)>=32 &&(ch-1)<= 126) cout << ch-1 << endl; else cout << "Input Error!"<< endl; if((ch +1)>= 32 &&(ch + 1)<= 126) cout << ch +1<< endl; else cout << "Input Error!" << endl; return 0 ; }