        it "should do sample 4" $ do
            let input = "hgt:59cm ecl:zzz\neyr:2038 hcl:74454a iyr:2023\npid:3556412378 byr:2007"
            let expected = 0
            day4b input `shouldBe` expected
        it "should do sample 5" $ do
            let input = "pid:087499704 hgt:74in ecl:grn iyr:2012 eyr:2030 byr:1980\nhcl:#623a2f"
            let expected = 1
            day4b input `shouldBe` expected
        it "should do sample 6" $ do
            let input = "eyr:2029 ecl:blu cid:129 byr:1989\niyr:2014 pid:896056539 hcl:#a97842 hgt:165cm"
            let expected = 1
            day4b input `shouldBe` expected
        it "should do sample 7" $ do
            let input = "hcl:#888785\nhgt:164cm byr:2001 iyr:2015 cid:88\npid:545766238 ecl:hzl\neyr:2022"