Types: q: int, key: str, x: int, L: str, R: str
Ranges: 1 ≤ q ≤ 200,000, 1 ≤ x ≤ 1,000,000,000, 1 ≤ length of key ≤ 20, key consists of lower-case letters, L ≤ R in lexicographic order
Addtl Info: The total number of elements printed by dump operations does not exceed 1,000,000