C21321133133313121211113313331323133313231333132233132313111231   >>    C2132113313331312121111331333132313331323133313223313231311123   <<    C21321133133313121211113313331323133313231333132233132313111233   >>      C21321133133313121211113313331323133313231333132233132313111232   >>