# coding: utf-8
# Your code here!

import copy
import sys

res = []

t = int(input())
for i in range(t):
    s = input()
    tmp = []
    for c in s:
        tmp.append(int(c))
    res.append(tmp)

for j in range(t):
    length_res = len(res[j])
    added = 0
    new = []
    while length_res > 1:
        for i in range(length_res-1):
            cur = res[j][i] + res[j][i+1]
            if len(str(cur)) > 1:
                added = int(str(cur)[0]) + int(str(cur)[1])
            else:
                added = cur
            new.append(added)
        res[j] = copy.copy(new)
        new.clear()
        length_res = len(res[j])

for i in range(t):
    print(res[i][0])