I'll format the problem.
. . Maybe others will be tempted to try it.
I've made some observation . . .Use the digits 0-9 exactly twice.Code:A B C × D E F - - - - - G H I J K L M N P - - - - - Q R S T U
Assuming a number may not begin with zero: .
Also, neither nor can be zero.
. . Otherwise: . ... and we'd have three 0's.
. . Stay tuned . . .