C112122131333131323132313221323132313331323131123313233313222211   >>    C11212213133313132313231322132313231333132313112331323331322221   <<    C112122131333131323132313221323132313331323131123313233313222213   >>      C112122131333131323132313221323132313331323131123313233313222212   >>