give string paragraph string array ban word ban return frequent word ban it guarantee word ban answer uniquethe word paragraph caseinsensitive answer return lowercase Example 1input paragraph Bob hit ball hit BALL fly far hit ban hitoutput ballexplanation hit occur 3 time ban wordball occur twice word frequent nonbanne word paragraph note word paragraph case sensitivethat punctuation ignore adjacent word ball hit is not answer occur bannedexample 2input paragraph ban Output Constraints1 paragraphlength 1000paragraph consist english letter space symbol 0 bannedlength 1001 bannedilength 10bannedi consist lowercase english letter