|+-- playing card letters.txt -----------------------+|

A standard deck of cards has 52 cards, which is 26×2.
This means it's possible to uniquely and exhaustively
assign each one a cased Latin letter.
Case can be used for a color distinction, leaving the
task down to dividing the 26 letters into two sets of
13 with each one corresponding to a different value.

Here's my attempt at that:

	spa	hea	clu	dia
Ace	A	a	I	i
  2	C	c	Z	z
  3	T	t	E	e
  4	N	n	R	r
  5	F	f	S	s
  6	H	h	D	d
  7	V	v	L	l
  8	G	g	B	b
  9	Y	y	P	p
 10	X	x	O	o
Jak	J	j	U	u
Qen	Q	q	W	w
Kng	K	k	M	m


+--- Letter choice reasoning -------------------------+
As A Ace
2s C C has two points
3s T Three, three points
4s N N has four points
5s F Five, five points
6s H H has six points
7s V seVen, similar shape
8s G eiGht
9s Y the whole nine Yards
Ts X roman numerals
Js J Jack
Ks K King
Qs Q Queen

Ah I visual similarity (1)
2h Z visual similarity
3h E visual similarity
4h R visual similarity
5h S visual similarity
6h D visual similarity
7h L looks like a turned 7
8h B visual similarity
9h P visual similarity
Th O looks like a zero
Jh U Undecim
Kh M Man
Qh W Woman