C11112331333132311331333133313331312111113112113313331323211232323311   >>    C1111233133313231133133313331333131211111311211331333132321123232331   <<    C11112331333132311331333133313331312111113112113313331323211232323313   >>      C11112331333132311331333133313331312111113112113313331323211232323312   >>