Regular Expressions 101

Pro

1st Alternative(?<=\s)(\d+)\s(st(u?)k?)s?

Positive Lookbehind(?<=\s)

\sany whitespace character

Group 1(\d+)

\d+a digit, repeated at least once

\sany whitespace character

Group 2(st(u?)k?)

stthe literal text st (case sensitive)

Group 3(u?)

u?optionally matches the literal u (117₁₀ / 165₈ / 75₁₆) (case sensitive)

k?optionally matches the literal k (107₁₀ / 153₈ / 6B₁₆) (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

2nd Alternative(p((ie)?ce(s?)))

Group 4(p((ie)?ce(s?)))

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

Group 5((ie)?ce(s?))

Group 6(ie)?

?repeats the group contents below at most once:

iethe literal text ie (case sensitive)

cethe literal text ce (case sensitive)

Group 7(s?)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

(?<=\s)(\d+)\s(st(u?)k?)s?|(p((ie)?ce(s?)))

apple 10m
10mm
11ml
11kg
12g
13gr
14m3
15m2

apple 10 stuks 
10 pieces
11 pces
11 pce
12 stk
13 stuks
14m3
15m2

apple 10m
10mm
11ml
11kg
12g
13gr
14m3
15m2

apple 10 stuks 
10 pieces
11 pces
11 pce
12 stk
13 stuks
14m3
15m2