{"code":"def group_by_length(words):\n    groups = {}\n    for word in words:\n        groups.setdefault(len(word), []).append(word.upper())\n    return groups","input":"group_by_length([\"a\", \"to\", \"be\"])","language":"Python","predicted_output":"{1: ['A'], 2: ['TO', 'BE']}"}