/************************************************************
	> File Name: a.cpp
	> Author: TSwiftie
	> Mail: 2224273204@qq.com 
	> Created Time: Mon 09 Dec 2019 05:59:44 PM CST
************************************************************/

#include <iostream>
#include <string>
#include <cstring>
#include <cstdio>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <cstdlib>
#include <cmath>
#include <vector>
#include <iomanip>
//#include <unordered_map>
#define lowbit(x) (x&-x)
#define lc (o<<1)
#define rc (o<<1|1)
#define IOS ios::sync_with_stdio(false);cin.tie(0);cout.tie(0)
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const int INF = 0x3f3f3f3f;
const int MAXN = 1e5+5;
const int MAXM = 2e5+5;
const int MOD = 1e9+7;
const int dir[4][2] = {1,0,-1,0,0,1,0,-1};
const double PI = acos(-1.0);
const double EXP = 1e-8;
int main(void){
	int a, b, c;
	while(~scanf("%d%d%d",&a,&b,&c)){
		if(a+b+c>=22)
			printf("bust\n");
		else
			printf("win\n");
	}
	return 0;
}