C11212213133313132313231322132313231333132313112331323331323131323221221   >>    C1121221313331313231323132213231323133313231311233132333132313132322122   <<    C11212213133313132313231322132313231333132313112331323331323131323221223   >>      C11212213133313132313231322132313231333132313112331323331323131323221222   >>