// yukicoder 304 (http://yukicoder.me/problems/765)
#include<cstdio>
#define rep(i,a) for(int i=0;i<(a);++i)

char S[10];

int main()
{
	rep( i, 1000 )
	{
		printf( "%03d\n", i );
		scanf( "%s", S );

		if( *S == 'u' )
			break;
	}

	return 0;
}