<Table> <Tr> <Th_colspan="2"> Fortis </Th> <Th_colspan="2"> Lenis </Th> </Tr> <Tr> <Td> / p / </Td> <Td> pit </Td> <Td> / b / </Td> <Td> bit </Td> </Tr> <Tr> <Td> / t / </Td> <Td> tin </Td> <Td> / d / </Td> <Td> din </Td> </Tr> <Tr> <Td> / k / </Td> <Td> cut </Td> <Td> / ɡ / </Td> <Td> gut </Td> </Tr> <Tr> <Td> / tʃ / </Td> <Td> cheap </Td> <Td> / dʒ / </Td> <Td> jeep </Td> </Tr> <Tr> <Td> / f / </Td> <Td> fat </Td> <Td> / v / </Td> <Td> vat </Td> </Tr> <Tr> <Td> / θ / </Td> <Td> thigh </Td> <Td> / ð / </Td> <Td> thy </Td> </Tr> <Tr> <Td> / s / </Td> <Td> sap </Td> <Td> / z / </Td> <Td> zap </Td> </Tr> <Tr> <Td> / ʃ / </Td> <Td> dilution </Td> <Td> / ʒ / </Td> <Td> delusion </Td> </Tr> <Tr> <Td> / x / </Td> <Td> loch </Td> <Td_colspan="2"> </Td> </Tr> <Tr> <Td> / h / </Td> <Td> ham </Td> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> </Td> <Td> / m / </Td> <Td> map </Td> </Tr> <Tr> <Td_colspan="2"> </Td> <Td> / n / </Td> <Td> thin </Td> </Tr> <Tr> <Td_colspan="2"> </Td> <Td> / ŋ / </Td> <Td> thing </Td> </Tr> <Tr> <Td_colspan="2"> </Td> <Td> / j / </Td> <Td> yes </Td> </Tr> <Tr> <Td_colspan="2"> </Td> <Td> / w / </Td> <Td> we </Td> </Tr> <Tr> <Td_colspan="2"> </Td> <Td> / r / </Td> <Td> run </Td> </Tr> <Tr> <Td_colspan="2"> </Td> <Td> / l / </Td> <Td> left </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Fortis </Th> <Th_colspan="2"> Lenis </Th> </Tr> <Tr> <Td> / p / </Td> <Td> pit </Td> <Td> / b / </Td> <Td> bit </Td> </Tr> <Tr> <Td> / t / </Td> <Td> tin </Td> <Td> / d / </Td> <Td> din </Td> </Tr>

How many vowels are there in the english language