CREATE TABLE table_name_45 (letter VARCHAR, operator VARCHAR, as_number VARCHAR)

Which letter has an operator of VeriSign and an AS-number of AS26415?
SELECT letter FROM table_name_45 WHERE operator = "verisign" AND as_number = "as26415"
SELECT "letter" FROM "table_name_45" WHERE "as26415" = "as_number" AND "operator" = "verisign"