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