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##### LM #####
rl ident_pattern /[a-zA-Z_][a-zA-Z_0-9]*/
rl number_pattern /[0-9]+/
lex
ignore /[ \t\n]+/
token id /ident_pattern/
token number /number_pattern/
end
def four_ids
[id id id id]
Constructed: four_ids = construct four_ids "a b c d"
print_xml( Constructed )
print( '\n' )
##### EXP #####
<four_ids><id>a</id><id>b</id><id>c</id><id>d</id></four_ids>
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