import std.stdio, std.string, std.algorithm, std.array, std.range, std.conv,
    std.typecons, std.math, std.container, std.format;

void main(string[] args)
{
    if (readln.split.to!(long[]).sum >= 22)
    {
        writeln("bust");
    }
    else
    {
        writeln("win");
    }
}
