OK, so I am choosing 4 letters/numbers out of 10 possible letters. These letters are X,Y,LT,LB,RT,RB,U,D,L,R. The first three letters can be any one of these, but must contain at least one X or Y. The last letter can be an U,D,L, or right. Can someone please figure out the possible combinations?
Figuring out possible combinations with restrictions
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combinatorics
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1Seem like you might be writing a game, if so, why don't you write to a program to generate it out? Also, you are missing A,B? – 2011-02-03
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2LT, LB, RT, RB are letters? – 2011-02-03