import std;

alias sread = () => readln.chomp();
alias lread = () => readln.chomp.to!long();
alias aryread(T = long) = () => readln.split.to!(T[]);

void main()
{
    long a1, a2, a3;
    scan(a1, a2, a3);
    if (a1 + a2 + a3 <= 21)
    {
        writeln("win");
    }
    else if (22 <= a1 + a2 + a3)
    {
        writeln("bust");
    }

}

void scan(L...)(ref L A)
{
    auto l = readln.split;
    foreach (i, T; L)
    {
        A[i] = l[i].to!T;
    }
}
