Entry #4 is too spaced out
Entry #6 Is close to what I am looking for
Entry #5 I like the concept, just worried about people interpreting a backwards letter
Entry #3 Great concept, but the last D looks like its a B, being that the the first letter would be interpreted as a lowercase d and the second one is an uppercase D (again might confuse people of what letter it is, D or B)
Entry #4 has the same issue as entry number 3