unittest
{
	assert( [ "5 7 9" ].parse.expand.solve == "win" );
	assert( [ "13 7 2" ].parse.expand.solve == "bust" );
}



import std.algorithm;
import std.conv;
import std.range;
import std.stdio;
import std.typecons;

void main()
{
	stdin.byLineCopy.parse.expand.solve.writeln;
}

auto parse( Range )( Range input )
if( isInputRange!Range && is( ElementType!Range == string ) )
{
	auto as = input.front.split.to!( long[] );
	return tuple( as );
}

auto solve( long[] as )
{
	return ( as.sum <= 21 ) ? "win" : "bust";
}
