def sub_seq(string):
count=0
length=len(string)
for i in range(length):
for k in range(i+1,length):
if string[i]==string[k]:
for each in range(i+1,k):
for j in range(k+1,length):
if string[each]==string[j]: return 1
return 0
for each in range(int(input())):
string=input().strip()
if sub_seq(string)==1: print(‘yes’)
else: print(‘no’)