The spelling of "shimun xxi benyamin" is a bit tricky due to its unique phonetic makeup. The "sh" sound is represented by the letters "sh," while the "i" is pronounced as "ih". The "m" in Shimun is straightforward, but the "u" sound is spelled as "u" in this instance. The "n" and "xxi" are easy enough, but "benyamin" requires finesse. The "e" sound is pronounced as "eh," the "y" as "yuh," and the "a" as "ah." The rest of the letters follow standard English pronunciation.