t = int(input())

for _ in range(t):
    s = list(map(int, str(input())))
    while len(s) > 1:
        l = []                          
        for i in range(len(s)-1):
            x = s[i+1] + s[i]
            if x > 9:
                x = x//10 + x%10
            l.append(x)
        s = l
    print(*s)