C1111233131211111211113313331333133313232321333133313231111232313321   >>    C111123313121111121111331333133313331323232133313331323111123231332   <<    C1111233131211111211113313331333133313232321333133313231111232313323   >>      C1111233131211111211113313331333133313232321333133313231111232313322   >>