Pronunciation: [lˈɛtɪd nˈɛkst tuː] (IPA)
Correct spelling for the English word "letted next to" is [lˈɛtɪd nˈɛkst tuː], [lˈɛtɪd nˈɛkst tuː], [l_ˈɛ_t_ɪ_d n_ˈɛ_k_s_t t_uː] (IPA phonetic alphabet).