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