#include<string.h>
#include<stdio.h>
int main()
{
    int m;
    char a[100];
    scanf("%s",a);
    m=strlen(a);
   if(m==10)
       printf("shi yi");
    if(m==9)
        printf("yi");
    if(m==8)
        printf("qian wan");
    if(m==7)
        printf("bai wan");
    if(m==6)
        printf("shi wan");
    if(m==5)
        printf("wan");
    return 0;
}

/**************************************************************
	Problem: 1322
	User: admin
	Language: C
	Result: Accepted
	Time:18 ms
	Memory:1144 kb
****************************************************************/