C2122121212121133132213231313231333131323331323221323223313112121   >>    C212212121212113313221323131323133313132333132322132322331311212   <<    C2122121212121133132213231313231333131323331323221323223313112123   >>      C2122121212121133132213231313231333131323331323221323223313112122   >>