C1111233131211111211113313231333132333132322331323133313232123321   >>    C111123313121111121111331323133313233313232233132313331323212332   <<    C1111233131211111211113313231333132333132322331323133313232123323   >>      C1111233131211111211113313231333132333132322331323133313232123322   >>