Just from a vtracs point of view
Next you gather all short sum 0,9 & 3 combos exclude the triples
012, 018, 019, 027, 028, 036, 037, 045, 046, 049, 058, 067, 126, 127, 135, 136, 139, 145, 148, 157, 234, 235, 238, 247, 256, 289, 346, 379, 389, 469, 478, 479, 568, 569, 578, 689
003, 009, 117, 118, 225, 226, 229, 334, 337, 144, 244, 445, 055, 355, 559,
166, 667, 668, 577, 677, 779, 388, 488, 788, 199, 299, 599
**************************************************
exclude the doubles from above
012, 018, 019, 027, 028, 036, 037, 045, 046, 049, 058, 067, 126, 127, 135, 136, 139, 145, 148, 157, 234, 235, 238, 247, 256, 289, 346, 379, 389, 469, 478, 479, 568, 569, 578, 689
*******************************************************
Vtrac the above
123 124 125 133 134 142 143 151 152 155 114 123 232 233 241 242 245 251 254 213 345 341 344 353 312 345 452 435 445 525 534 535 124 125 134 245
****************************************************
exclude the doubles from above
Singles
123 124 125 134 142 143 152 123 241 245 251 254
213 345 341 312 345 452 435 534 124 125 134 245
*************************************
Highest key digits of above singles 1-2-4 =12x-24x-14x
123 124 125 134 142 143 152 123 241 251 213 341 312 124 125 134
123 124 125 142 152 123 241 245 251 254 213 312 452 124 125 245
124 134 142 143 241 245 254 345 341 345 452 435 534 124 134 245
***************************************
Above Results deflated
124(142,241,124,124,142,241,124,124,142,241,124)
012, 018, 019, , 028,036BX, 037, 046, 067, 135, 139, 145, 148, 157, 234, 235, 256, 289, 346, 379, 478, 568, 569, 578, 689