PKAlternation + PKAny Repetition = Random Results

[agg23]

Running the following parser results in some random results. The result occasionally contains "search" and/or "for", assumedly because of the PKAny Repetition immediately before and after the PKAlternation. Is there any way to resolve this or am I stuck with it?

    NSString *string = @"google search for ducky ducky super ducky duck";
    PKSequence *parser = [PKSequence sequence];

    PKRepetition *repetitionTest = [PKRepetition repetitionWithSubparser:[[PKAny any] discard]];

    [parser add:repetitionTest];

    PKAlternation *optionalSearch = [PKAlternation alternation];
    [optionalSearch add:[[PKEmpty empty] discard]];
    [optionalSearch add:[[PKLiteral literalWithString:@"search"] discard]];
    [parser add:optionalSearch];

    [parser add:[[PKLiteral literalWithString:@"google"] discard]];
    [parser add:optionalSearch];

    PKAlternation *optionalFor = [PKAlternation alternation];
    [optionalFor add:[[PKEmpty empty] discard]];
    [optionalFor add:[[PKLiteral literalWithString:@"for"] discard]];

    [parser add:optionalFor];

    PKRepetition *searchTerm = [PKRepetition repetitionWithSubparser:[PKAny any]];
    [parser add:searchTerm];
    PKAssembly *result = [parser bestMatchFor:[PKTokenAssembly assemblyWithString:string]]

[zakdances]

Are you still seeing incorrect output?

[agg23]

Indeed. I have not discovered the issue.

[agg23]

Would you happen to have any suggestions?