def METHOD_NAME(cycles_map, blender_map):
    cycles_to_blender = []
    for stamped_subject, commit_hash in cycles_map.items():
        if stamped_subject not in blender_map:
            cycles_to_blender.append(commit_hash)
    blender_to_cycles = []
    for stamped_subject, commit_hash in blender_map.items():
        if stamped_subject not in cycles_map:
            blender_to_cycles.append(commit_hash)
    return cycles_to_blender, blender_to_cycles