Level 81
Level 83
10 words 0 ignored
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Ignore words
Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.
Ignore?
[abc]
Find any of the characters between the brackets
[0-9]
Find any digit from 0 to 9
(x|y)
Find any of the alternatives separated with |
\d
Find a digit
\s
Find a whitespace character
\b
Find a match at the beginning or at the end of a word
\uxxxx
Find the Unicode character specified by the hexadecimal number xxxx
n+
Matches any string that contains at least one n
n*
Matches any string that contains zero or more occurrences of n
n?
Matches any string that contains zero or one occurrences of n
