T = int(input().strip())

def f2(txt):
  tmp = int(txt[0]) + int(txt[1])
  return str(tmp // 10 + tmp % 10)

def f(txt):
  while True:
    if len(txt) == 1:
      return txt
    
    txt = ''.join([f2(txt[i:i+2]) for i in range(len(txt) - 1)])

lst = [f(input().strip()) for _ in range(T)]
for i in lst:
  print(i)