That means that every letter with a line of symmetry like M wouldn't work: A, T, U, V, W, and Y. But you can use the letters B, C, D, E, H, I, K, O, and X. It doesn't sound like a name but it could be Obeidh, Ikechi, Hideki, Dockie, Bohdie, Bodhie, Bobbie (unless you can't use the same letter twice), Debbie ("), Becki, Bodhe, Chiko, Cobie, Dixie ("), Echoe ("), Eddie ("), Kobe, Khoi, Echo, Bobo, Hido, Hebe, Kebe, Cobi, Debb, Kiki, Beck, Ike, Koe, Ed,