Letter combinations

It's useful to order the letters on your rack, putting the most common combinations together. The 50 most common letter combinations are:

Percentage	Combo
21.0%	ES
18.4%	IN
17.8%	ER
13.0%	TI
10.9%	TE
10.8%	AT
10.7%	IS
10.7%	ON
10.6%	RE
10.5%	NG
9.5%	ED
9.4%	EN
9.3%	ST
9.1%	ING
9.1%	RI
8.9%	AL
8.8%	LI
8.7%	AN
8.6%	RA
8.6%	LE
8.1%	NE
7.9%	SE
7.7%	AR
7.3%	IC
7.1%	OR
6.9%	RO
6.7%	NT
6.1%	IT
6.0%	IE
5.9%	LA
5.8%	CO
5.8%	DE
5.6%	SS
5.5%	IO
5.3%	RS
5.3%	NS
5.2%	NI
5.2%	CA
5.1%	AS
5.0%	TA
5.0%	HE
4.9%	DI
4.9%	TR
4.9%	TO
4.9%	ME
4.8%	CH
4.7%	UN
4.7%	LO
4.6%	EL
4.6%	OL

Note, this differs quite a bit from what is listed on http://www2.scrabble-assoc.com/Images/Images/10ways11.pdf .

Want to improve your Scrabble, Words with Friends or Letterpress abilities? Get the app:

bin/find_groups.rb | sort | uniq -c | sort -rn | head -50 | awk ' { printf "%2.1f%%", ($1 / 272293) * 100; print " " $2} '| sed -E 's/$/\
|-/'