Regular Expressions 101

Explanation
Pro

Group city(?<city>[A-Z]{1,2})

Character Class[A-Z]{1,2}

{1,2}matches between 1 and 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Group 2([^\S\r\n]|-)*

*repeats the group contents below any number of times:

1st Alternative[^\S\r\n]

Negated Character Class[^\S\r\n]

\Sany non-whitespace character

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

2nd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group letters2(?<letters2>[A-Z]){1,2}

{1,2}repeats the group contents below between 1 and 2 times:

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Negated Character Class[^\S\r\n]*

*matches any number of characters outside the set below:

\Sany non-whitespace character

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Group numbers(?<numbers>[0-9]{1,4})

Character Class[0-9]{1,4}

{1,4}matches between 1 and 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Negated Character Class[^\S\r\n]*

*matches any number of characters outside the set below:

\Sany non-whitespace character

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Group suffix(?<suffix>E)?

?repeats the group contents below at most once:

Ethe literal E (69₁₀ / 105₈ / 45₁₆) (case sensitive)

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

(?<city>[A-Z]{1,2})([^\S\r\n]|-)*(?<letters2>[A-Z]){1,2}[^\S\r\n]*(?<numbers>[0-9]{1,4})[^\S\r\n]*(?<suffix>E)?

 AB CD 1334E  
 A-CD 1334E
RZ-SN440 E 
 RZ - F4 E 
 RZ - F4223

 AB CD 1334E  
 A-CD 1334E
RZ-SN440 E 
 RZ - F4 E 
 RZ - F4223