C11111211113313112113313331333133313331333132311233133313331333132322123221   >>    C1111121111331311211331333133313331333133313231123313331333133313232212322   <<    C11111211113313112113313331333133313331333132311233133313331333132322123223   >>      C11111211113313112113313331333133313331333132311233133313331333132322123222   >>