21XX11X12121X112
21XX11XX212XX112
21XX11X22121XX12
21XX11X1212XXX12
21XX11XX2121X112
21XX11X2212XX112
21XX11X12121XX12
21XX11XX212XXX12
21XX11X22121X112
21XX11X1212XX112
21XX11XX2121XX12
21XX11X2212XXX12
