ar = [1, 6, 5, 4, 5, 6, 4]
r = ar[0] 
for i in range(1,len(ar)): 
    r = r ^ ar[i] 
print("Element  is",r)

d33d4e9eec8015a359bbe8f8a724908f8a25d661
<mask token>

<mask token>
for i in range(1, len(ar)):
    r = r ^ ar[i]
print('Element  is', r)

ar = [1, 6, 5, 4, 5, 6, 4]
r = ar[0]
for i in range(1, len(ar)):
    r = r ^ ar[i]
print('Element  is', r)

ar = [1, 6, 5, 4, 5, 6, 4]
r = ar[0] 
for i in range(1,len(ar)): 
    r = r ^ ar[i] 
print("Element  is",r)
