I stumbled upon this code, but was unable to get it to work. I am guessing since 2010 the syntax has changed a bit. In any case here is an update in case anyone needs to do this:
if _infile_ ne ' '; * not blank ;
if '0' < substr(_infile_,1,1) <= '9'; * begins with number ;
num_end = index(_infile_, ' '); * find blank ;
_infile_ = substr(_infile_, num_end); * take rest of line ;
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