How many constructions has a Wheel arrange- ment of 4-4-0?
CREATE TABLE table_67555 (
    "Builder" text,
    "Construct- tion no." real,
    "Date ordered" text,
    "Wheel arrange- ment" text,
    "s Cylinder" text,
    "Engine weight" text,
    "TC&StL no. (1883\u201384)" real
)
SELECT SUM("Construct- tion no.") FROM table_67555 WHERE "Wheel arrange- ment" = '4-4-0'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many constructions has a Wheel arrange- ment of 4-4-0? ### Input: CREATE TABLE table_67555 (
    "Builder" text,
    "Construct- tion no." real,
    "Date ordered" text,
    "Wheel arrange- ment" text,
    "s Cylinder" text,
    "Engine weight" text,
    "TC&StL no. (1883\u201384)" real
) ### Response: SELECT SUM("Construct- tion no.") FROM table_67555 WHERE "Wheel arrange- ment" = '4-4-0'