# Write a Python program to Find common elements in three sorted arrays by dictionary intersection # Function to find common elements in three# sorted arraysfrom collections import Counter  def commonElement(ar1,ar2,ar3):     # first convert lists into dictionary     ar1 = Counter(ar1)     ar2 = Counter(ar2)     ar3 = Counter(ar3)          # perform intersection operation     resultDict = dict(ar1.items() & ar2.items() & ar3.items())     common = []           # iterate through resultant dictionary     # and collect common elements     for (key,val) in resultDict.items():          for i in range(0,val):               common.append(key)       print(common)  # Driver programif __name__ == "__main__":    ar1 = [1, 5, 10, 20, 40, 80]    ar2 = [6, 7, 20, 80, 100]    ar3 = [3, 4, 15, 20, 30, 70, 80, 120]    commonElement(ar1,ar2,ar3)