C11112331333132311331333133313331333132312323133313113311211321   >>    C1111233133313231133133313331333133313231232313331311331121132   <<    C11112331333132311331333133313331333132312323133313113311211323   >>      C11112331333132311331333133313331333132312323133313113311211322   >>