C2122121212121133132213231313231333131323223313233233313231323223311231   >>    C212212121212113313221323131323133313132322331323323331323132322331123   <<    C2122121212121133132213231313231333131323223313233233313231323223311233   >>      C2122121212121133132213231313231333131323223313233233313231323223311232   >>