price: 5 dollars, fee: 12 dollars
price: USD 5, fee: USD 12
replaceAll("$")  -> IllegalArgumentException: Illegal group reference: group index is missing
price: 5 $, fee: 12 $
price: 10 USD, fee: 24 USD
unquoted lambda  -> IndexOutOfBoundsException: No group 5
hello ankur, you owe $5
hi ${nobody}
rEgUlAr ExprEssIOns