The viola is tuned one fifth below the violin and therefore they have three strings tuned in common: G, D, and which other?
A Ａ A (letter) 🄰 🄐 U+0043 🅐 LetterA ⒜ The Letter A
🅐 🄰 ⒜ 🄐 ａ lettera letter u 0043
WikipediaEntity
A