C111123313331323113313331333133313231323133312111113331311331313222321   >>    C11112331333132311331333133313331323132313331211111333131133131322232   <<    C111123313331323113313331333133313231323133312111113331311331313222323   >>      C111123313331323113313331333133313231323133312111113331311331313222322   >>