import sequtils,strutils,math
var
    N = stdin.readline.parseInt
    a,b,c : int
    n : int
for i in 1..N:
    (a, b) = stdin.readline.split.map(parseInt)
    c = b - a
    if c == 0:
        n = 61
    elif c div abs(c) == 1:
        n = 60
    else:
        n = 62
    echo $chr(n)