#include<stdio.h>
#include<string.h>
    int arrkeyword(char word[]){
    char keyword[32][10] = {"auto","case","void","while","const","do","union"};
    for(int i=0; i<32; i++){
        if(strcmp(word, keyword[i])==0){
            return 1;
        }
    }
    return 0;
    }
    int main(){
        char word[30];
        scanf("%30",word);
        if (arrkeyword(word))
        printf("keyword");
        else
        printf("Not a keyword");
        return 0;
    }