sort_script for OneTab

i = input()
x = 0

xx = []
xxx = []
while i != 'stop':
  #print(i)
  xx.append(i)
  i = input()
print('--------------')
#print(xx)
xx.sort()
xx.append('end')
#print(xx)
#print(len(xx),xx[])
print('--------------',len(xx))
print()
print()
print()
print()
y = 0
for j in range(len(xx)+1):

  if j+1 < (len(xx)):

    if xx[j] != xx[j+1]:
      xxx.append(xx[j])
      print(xx[j])
      y += 1
      if y == 20:
        print()
        y = 0

print(len(xxx))