Data to parse (format: email@example.com[TAB|SPACE]ID[TAB|SPACE]field1[TAB|SPACE]field2) different+test@example.com field-d1 field-d2 di.ffe.ren.t+test@example.com field-d1 field-d2 email@example.com field-a1 field-a2 e.mail@example.com field-b1 field-b2 emai.l+test@example.com field-c1 field-c2 valid@example.com field-f1 field-f2 INVALID field-e1 field-e2 Find duplicates