C11111211113313112113313331333133313331333132313231333133313331323132313231221   >>    C1111121111331311211331333133313331333133313231323133313331333132313231323122   <<    C11111211113313112113313331333133313331333132313231333133313331323132313231223   >>      C11111211113313112113313331333133313331333132313231333133313331323132313231222   >>