grep -E '^\s*(int|double)\s+[a-zA-Z_]+(\s*,\s*[a-zA-Z_]+)*\s*;' GrepExVars
int aDog; int aDog ; // int aCommentAboutADog; double aBigDog; int BadDog; int dogWithNoTail int aDog,aCat; int aSpaceDog, aSpaceCat; int aDog aBadCat; internationalDog; int a#Dog; int internetName; // fooo
!17 !gli
ls & ps & date & ls ; ps ; date
find / -empty | wc -w
bbbbcc abbccc aaabbbccc aaabbbcccddd bccbccbccbccbcc