12791.py

# Starman
import sys

input = sys.stdin.readline

bowie = {
    1967: ["DavidBowie"],
    1969: ["SpaceOddity"],
    1970: ["TheManWhoSoldTheWorld"],
    1971: ["HunkyDory"],
    1972: ["TheRiseAndFallOfZiggyStardustAndTheSpidersFromMars"],
    1973: ["AladdinSane", "PinUps"],
    1974: ["DiamondDogs"],
    1975: ["YoungAmericans"],
    1976: ["StationToStation"],
    1977: ["Low", "Heroes"],
    1979: ["Lodger"],
    1980: ["ScaryMonstersAndSuperCreeps"],
    1983: ["LetsDance"],
    1984: ["Tonight"],
    1987: ["NeverLetMeDown"],
    1993: ["BlackTieWhiteNoise"],
    1995: ["1.Outside"],
    1997: ["Earthling"],
    1999: ["Hours"],
    2002: ["Heathen"],
    2003: ["Reality"],
    2013: ["TheNextDay"],
    2016: ["BlackStar"],
}

Q = int(input())
for _ in range(Q):
    S, E = map(int, input().split())
    total = []
    for y in range(S, E + 1):
        if y in bowie:
            for n in bowie[y]:
                total.append(f"{y} {n}")
    print(len(total))
    for i in total:
        print(i)