Hangul has 14 basic consonants and 10 basic vowels. It should be noted that the romanised (English) spelling of Korean words can be very variable.
For example: the letters 'b' & 'p' are more or less interchangeable.
The same applies to 'g' & 'k', 't' & 'd', 'r' & 'l', 'j' & 'ch', and 'u' & 'oo'