ใคร ขาย ไข่ ไก่ (kai khaiy khai kaii = who sell an eeg)
never see foreigner speak 'em cleary
The alphabet of ร
None are hard to pronounce, provided I remember how the word is spelled. If I don't know how the word is spelled, I can easily mispronounce tones, vowel lengths, vowels and even consonants.