#include<iostream> using namespace std; int main(){ char a; cin.get(a); 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; }else{ cout<<"Input Error!"; } return 0; }