 
 <translate> Mona joined 9 groups, so she played with 9 * 4 = 36 people. She grouped with 2 + 1 = 3 people twice. Thus, she played with 36 - 3 = 33 unique players that weekend. The final answer: 33. <hau> Mona ta shiga kungiyoyi 9, don haka ta yi wasa da 9 * 4 = mutane 36. Ta haɗu da mutane 2 + 1 = 3 sau biyu. Don haka, ta yi wasa da 'yan wasa 36 - 3 = 33 na musamman a wannan karshen mako. Amsar ita ce: 33. 