#include<bits/stdc++.h> using namespace std; int main() { char n; n=getchar(); for(int i=1;i<=126;i++){ if(n==i){ if(i+1>126){ cout<<i-1<<endl; cout<<"Input Error!"; } if(i-1<0){ cout<<"Input Error!"<<endl; cout<<i+1; } else{ cout<<i-1<<endl; cout<<i+1; } } } return 0; }