#include<bits/stdc++.h> using namespace std; int main(){ char a; cin>>a; int qian,hou; qian=a-1; hou=a+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; return 0; }