#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a; a=cin.get(); if((a-1)>=32&&(a-1)<=126) cout<<a-1<<endl; else cout<<"Input Error"<<endl; if((a+1)>=32&&(a+1)<=126) cout<<a+1<<endl; else cout<<"Input Error"<<endl; return 0; }