Class: IsGrimString

Method: public boolean doWorkReturnBoolean(String theString)

what it needs to do: IsGrimString.doWorkReturnBoolean(inputStr) will return true if a string is grim. We will say that a string is 'grim' if every occurence of 'gr' is followed by another 'gr'. Some examples: "great" returns false, "hello grgr bbbb gr" returns false (last 'gr' by itself), "randomgrgrnoisegrgrhappy" returns true.

JAVA