CREATE TABLE table_46737 ("Letter" TEXT, "IPv6 address" TEXT, "AS-number" TEXT, "Operator" TEXT, "Location #sites  ( global/local ) " TEXT, "Software" TEXT)

Which IPv6 address had a location of distributed using anycast 8/0 and a letter of A?
SELECT "IPv6 address" FROM table_46737 WHERE "Location #sites (global/local)" = 'distributed using anycast 8/0' AND "Letter" = 'a'
SELECT "IPv6 address" FROM "table_46737" WHERE "Letter" = 'a' AND "Location #sites (global/local)" = 'distributed using anycast 8/0'