If ‘code’ = 6241, ‘made’ = 5346, ‘come’ = 3124’ and ‘to’ = 27 then ‘dome’ = ?

The letters of 'code', 'made' and 'come' share only 'e', and their codes share only the digit 4, so e = 4. 'code' and 'made' share d and e (digits 6 and 4), so d = 6. 'made' and 'come' share m and e (3 and 4), so m = 3. In 'come', o is 1 or 2; 'to' = 27 suggests o = 2. So 'dome' = d 6, o 2, m 3, e 4 = 6234.