help with an spss code

#1
hi can someone please help me understand the meaning of this code? i have to translate it to sas....

define regg1 (!pos !tokens(1) / !pos !tokens(1)) .
get FILE = path + 'sumwide.sav'
keep=!concat(!1,'1') to !concat(!1, '109') time .
select if time eq 1.
recode !concat(!1,'1') to !concat(!1, '109') (sysmis=0) .

compute !concat('sum',!1 ) =sum(!concat(!1,'1') to !concat(!1, '109')) .
regression variables= !concat('sum',!1) !concat(!1,'1') to !concat(!1,'109')
/STATISTICS R CHANGE
/ dependent= !concat('sum',!1)
/ method =forward
/ missing=pairwise .
*coeff.
!enddefine .

thanks in advance
ella