def getMoreThanOnce(lst):
lenn = len(lst)
freq = [0] * 10
for i in range(0, lenn):
freq[lst[i]] += 1
return freq;
lst = [1, 6, 3, 1, 8, 9, 9, 1, 3, 4]
freq = [0] * 10
freq = getMoreThanOnce(lst)
lenn = len(lst)
for i in range(0, lenn):
if (freq[lst[i]] > 1):
print(lst[i], end = " ")
freq[lst[i]] = 0
'''
run:
1 3 9
'''