#include <iostream>
#include <stdio.h>
#include <string.h>
using namespace std;
int main()
{
char key[50][10] = {"public","void","new","int","float","void"};
char s[10];
scanf("%s",s);
int flag=1;
for (int i=0;i<50;i++) {
if (strcmp(key[i],s)==0) {
cout<<"Keyword"<<endl;
flag=0;
}
}
if (flag==1) {
cout<<"Identifier"<<endl;
}
return 0;
}
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