C11111211113313112113313331313331323133313331333132313331322121   >>    C1111121111331311211331333131333132313331333133313231333132212   <<    C11111211113313112113313331313331323133313331333132313331322123   >>      C11111211113313112113313331313331323133313331333132313331322122   >>