#include <iostream>
using namespace std;
intcheckAlpha(char C)
{
if (C>=65 && C<=90)   return 1;
else if (C>=97 && C<=122)   return 1;
else if (C==95)   return 1;
else return 0;
}
intcheckDigit(char C)
{
if (C>=48 && C<=56)   return 1;
else return 0;
}
int main()
{
stringstr;cout<<"Enter a identifier";cin>>str;
int state=1,length=str.length();
inti=0;
while (i<length)
    {
if(state==1 &&checkAlpha(str[i])==1)
        {
state=2;i++;
        }
else if(state==2 &&checkAlpha(str[i])==1)
         {
state=2;i++;
         }
else  if(state==2 &&checkDigit(str[i])==1)
      {
state=2;i++;
      }
else{state=3;break;}
    }
if(state==2)
cout<<"Accepted..."<<endl;
if(state==3)
cout<<"Rejected..."<<endl;
return 0;
}