C13131221323331323131323233231323223313233313211232313231322131   >>    C1313122132333132313132323323132322331323331321123231323132213   <<    C13131221323331323131323233231323223313233313211232313231322133   >>      C13131221323331323131323233231323223313233313211232313231322132   >>