Quantifiers


Quantifiers apply to the thing in front of them


r'ax*a'      # aa, axa, axxa, axxxa, ...
r'ax+a'      #     axa, axxa, axxxa, ...
r'ax?a'      # aa, axa
r'ax{2,4}a'  #          axxa, axxxa, axxxxa
r'ax{3,}a'   #                axxxa, axxxxa, ...
r'ax{17}a'   #                                 axxxxxxxxxxxxxxxxxa