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diff --git a/challenge-320/eric-cheung/python/ch-2.py b/challenge-320/eric-cheung/python/ch-2.py
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+++ b/challenge-320/eric-cheung/python/ch-2.py
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+
+## arrInts = [1, 23, 4, 5]  ## Example 1
+## arrInts = [1, 2, 3, 4, 5]  ## Example 2
+arrInts = [1, 2, 34]  ## Example 3
+
+nElemSum = sum(arrInts)
+nDigitSum = sum([sum([int(charLoop) for charLoop in list(str(nLoop))]) for nLoop in arrInts])
+
+## print (nElemSum)
+## print (nDigitSum)
+
+print (abs(nElemSum - nDigitSum))