When рука / ruka is the serbo-croatian what is the macedonian?
CREATE TABLE "selected_cognates" (
  "proto_slavic" text,
  "russian" text,
  "ukrainian" text,
  "belarusian" text,
  "polish" text,
  "czech" text,
  "slovak" text,
  "slovene" text,
  "serbo_croatian" text,
  "bulgarian" text,
  "macedonian" text
);
SELECT "macedonian" FROM "selected_cognates" WHERE "serbo_croatian"='рука / ruka';