#! ruby
# Try yukicoder
# author: Leonardone @ NEETSDKASU
############################################################
def gs() gets.chomp end
def gi() gets.to_i end
def gf() gets.to_f end
def gss() gs.split end
def gis() gss.map(&:to_i) end
def gfs() gss.map(&:to_f) end
def nmapf(n,f) n.times.map{ __send__ f } end
def ngs(n) nmapf n,:gs end
def ngi(n) nmapf n,:gi end
def ngss(n) nmapf n,:gss end
def ngis(n) nmapf n,:gis end
def arr2d(h,w,v=0) h.times.map{[v] * w} end
def for2p(hr,wr,&pr) hr.each{|i|wr.each{|j| yield(i,j)}} end
def nsum(n) n * (n + 1) / 2 end
def vcount(d,r=Hash.new(0)) d.inject(r){|r,e| r[e]+=1;r} end
############################################################

def isKadomatuRetsu(a1, a2, a3)
    a1 != a3 && ((a2 > a1 && a2 > a3) || (a2 < a1 && a2 < a3))
end

def checkNotKadomatsuRetsu(a1, a2, a3)
    return true if a1 > 0 && a2 > 0 && a1 == a2 
    return true if a2 > 0 && a3 > 0 && a2 == a3 
    return true if a1 > 0 && a3 > 0 && a1 == a3 
    return false if [a1, a2, a3].include? 0
    return isKadomatuRetsu(a1, a2, a3)
end

t = gi

t.times do
    
    l = gi
    a = ngis 3
    
    if checkNotKadomatsuRetsu(a[0][0], a[0][1], a[0][2])
        puts 0
        next
    end
    if checkNotKadomatsuRetsu(a[1][0], a[1][1], a[1][2])
        puts 0
        next
    end
    if checkNotKadomatsuRetsu(a[1][0], a[1][1], a[1][2])
        puts 0
        next
    end
    if checkNotKadomatsuRetsu(a[0][0], a[1][0], a[2][0])
        puts 0
        next
    end
    if checkNotKadomatsuRetsu(a[0][0], a[1][0], a[2][0])
        puts 0
        next
    end
    if checkNotKadomatsuRetsu(a[0][1], a[1][1], a[2][1])
        puts 0
        next
    end
    if checkNotKadomatsuRetsu(a[0][1], a[1][1], a[2][1])
        puts 0
        next
    end
    if checkNotKadomatsuRetsu(a[0][0], a[1][1], a[2][2])
        puts 0
        next
    end
    if checkNotKadomatsuRetsu(a[0][2], a[1][1], a[2][0])
        puts 0
        next
    end
    
    case 0
    when a[0][0]
        case 0
        when a[0][1]
        when a[0][2]
        when a[1][0]
        when a[1][1]
        when a[1][2]
        when a[2][0]
        when a[1][1]
        when a[1][2]
        end
    end
    
    puts -1
end