The word "Wiren" is spelled with five letters, in accordance with the English alphabet. The first sound in "Wiren" is represented by the letter 'W', which is pronounced as /w/. The second letter, 'i', is pronounced as /aɪ/, which stands for a diphthong sound. The third letter, 'r', represents the consonant sound /r/, followed by the letter 'e', which is pronounced as /ɛ/. Finally, the word "Wiren" concludes with the letter 'n', signifying the consonant sound /n/. Overall, "Wiren" is spelled with a combination of five different phonetic sounds.