t=int(input())
s=[input() for i in range(t)]
for i in range(t):
    v=list(s[i])
    while len(v)>=2:
        for i in range(len(v)-1):
            v[i]=str(int(v[i])+int(v[i+1]))
            if int(v[i])>=10:
                v[i]=str(int(v[i])%10+1)
        v=v[:-1]    
    print("".join(v))