func can_make_word(word, blocks) {

    blocks.map! { |b| b.uc.chars.sort.join }.freq!

    func(word, blocks) {
        var char = word.shift
        var candidates = blocks.keys.grep { |k| 0 <= k.index(char) }

        for candidate in candidates {
            blocks{candidate} <= 0 && next;
            local blocks{candidate} = (blocks{candidate} - 1);
            return true if (word.is_empty || __FUNC__(word, blocks));
        }

        return false;
    }(word.uc.chars, blocks)
}