Double Decker

Decode this and find the right password!

40204060402070304020306030307040403040204030504030401020702040303070403070304040304040204020306040304060703040703060403080210kv
fifiihloyfkkyokoxkkhcoeqjtkjhzvagokhszksophqojhzeamcoeqjtkkvfikoxkjhzvagokhpfmckvopfqiktaqkszkuvakfalkaydfmnhpuvomjhzaqoqoacfmn
kvfijhzayqoacjcfckvaktaqkamclzevlhqoihyokichkvoioehmctaqkfkilzevoaifoqsoeaziojhzvagoayqoacjkvovaqcoqtaqklzwipyycofjeygvpefcelqz

Challenge made by Include.