2N to in the same column same digit
1- identify digits: IN SAME COLUMN ( Column J ) and Same (Column K)
A-that are the same
B- or have one up
C- or have one down
2- in column J (only) identify the same number follow or the 1up or 1down
3- then shown in column T
3- Button in Column T1 call it 1D 2D