C2122121212121133132213231313231313231323223313231322331323112321   >>    C212212121212113313221323131323131323132322331323132233132311232   <<    C2122121212121133132213231313231313231323223313231322331323112323   >>      C2122121212121133132213231313231313231323223313231322331323112322   >>