def lag(hour,h1,m1,h2,m2):
    min=0
    if (hour+h1)==h2 and m1==m2:
        return min
    elif (hour+h1)==h2:
        return m1-m2
    th=h1+(hour-1)
    min=(60*(th-h2))+(m1)+(60-m2)
    return min


n=int(input())
for _ in range(n):
    l=list(map(int,input().strip().split()))
    hour=int(input())
    print(lag(hour,*l))