Here’s a raw story draft based on your title/notes. I’ve interpreted the fragments as character names, ages, and a possible code or relationship map.
“No,” Yosino whispered. “It’s from my grandmother. Dated today.” Yosino Granddaughter 1 Mago A Ver10 Eng 39 16
Her assistant, a quiet 16-year-old named Mago, looked up from her screen. “Same sender code as last week’s?” Here’s a raw story draft based on your title/notes