s1 = io.read()
a, n1, y = string.match(s1, "(%w+) (%d+) (%w+)")
s2 = io.read()
b, n2, y = string.match(s2, "(%w+) (%d+) (%w+)")
len1 = string.len(n1)
len2 = string.len(n2)
if(len1 < len2) then print(b) elseif(len2 < len1) then print(a)
else
    fin = false
    for i = 1, len1 do
        x1 = tonumber(string.sub(n1, i, i))
        x2 = tonumber(string.sub(n2, i, i))
        if(x1 < x2) then
            print(b)
            fin = true
            break
        elseif(x2 < x1) then
            print(a)
            fin = true
            break
        end
    end
    if(not fin) then print(-1) end
end