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