T = int(input())
abclst = [list(map(int, input().split())) for _ in range(T)]

for i in range(T):
    maxt = max(abclst[i])
    mint = min(abclst[i])
    midt = 0
    ans = -1
    if abclst[i].count(abclst[i][0]) == 3:
        if abclst[i][0] >= 3:
            print(3)
        else:
            print(-1)
        continue
    for j in range(3):
        if abclst[i][j] != maxt and abclst[i][j] != mint:
            midt = abclst[i][j]
            if j == 0 or j == 2:
                ans = 0
            break
    if ans == 0:
        print(ans)
    else:
        tmp1 = maxt - midt + 1
        if maxt - tmp1 == mint:
            tmp1 += 1
        if maxt - tmp1 > 0:
            ans = tmp1
        tmp2 = midt - mint + 1
        if midt - mint > 0:
            ans = min(ans, tmp2)
        print(-1)