[{"number":1,"letters":["\u0410","\u0414","\u0417","\u0418","\u041a","\u0425","\u042d","\u042f"]},{"number":2,"letters":["\u0410","\u0412"]},{"number":3,"letters":["\u0412"]},{"number":4,"letters":["\u0412"]},{"number":7,"letters":["\u0411"]},{"number":9,"letters":["\u0411"]},{"number":10,"letters":["\u0411"]}]