#include<bits/stdc++.h> using namespace std; int main(){ char c; scanf("%c",&c); int a=c-1; int b=c+1; if(a>=32&&a<=126){ cout<<a<<endl; }else{ cout<<"Input Error!"; } if(b>=32&&b<=126){ cout<<b<<endl; }else{ cout<<"Input Error!"; } return 0; }