#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; }