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