#include<bits/stdc++.h> using namespace std; int main() { //65~90 A 97~122 a 48~57 1 32~126 ~ char a; cin>>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<<endl; }else{ cout<<"Input Error!"<<endl; } return 0; }