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diff --git a/challenge-067/paulo-custodio/python/ch-1.py b/challenge-067/paulo-custodio/python/ch-1.py
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+#!/usr/bin/env python3
+
+# Challenge 067
+#
+# TASK #1 > Number Combinations
+# Submitted by: Mohammad S Anwar
+#
+# You are given two integers $m and $n. Write a script print all possible
+# combinations of $n numbers from the list 1 2 3 ... $m.
+#
+# Every combination should be sorted i.e. [2,3] is valid combination but [3,2] is not.
+#
+# Example:
+#   Input: $m = 5, $n = 2
+#
+#   Output: [ [1,2], [1,3], [1,4], [1,5], [2,3], [2,4], [2,5], [3,4], [3,5], [4,5] ]
+
+import sys
+from itertools import combinations
+
+m, n = map(int, sys.argv[1:3])
+m_list = list(range(1, m + 1))
+out = set()
+
+for combo in combinations(m_list, n):
+    out.add(str(sorted(combo)))
+
+print("[", ", ".join(sorted(out)), "]")
diff --git a/challenge-067/paulo-custodio/python/ch-2.py b/challenge-067/paulo-custodio/python/ch-2.py
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+#!/usr/bin/env python3
+
+# Challenge 067
+#
+# TASK #2 > Letter Phone
+# Submitted by: Mohammad S Anwar
+#
+# You are given a digit string $S. Write a script to print all possible letter
+# combinations that the given digit string could represent.
+#
+# Letter Phone
+#
+#
+# Example:
+#   Input: $S = '35'
+#
+#   Output: ["dj", "dk", "dl", "ej", "ek", "el", "fj", "fk", "fl"].
+
+import sys
+from itertools import product
+
+digits = {
+    '1': ['_', ',', '@'],
+    '2': ['a', 'b', 'c'],
+    '3': ['d', 'e', 'f'],
+    '4': ['g', 'h', 'i'],
+    '5': ['j', 'k', 'l'],
+    '6': ['m', 'n', 'o'],
+    '7': ['p', 'q', 'r', 's'],
+    '8': ['t', 'u', 'v'],
+    '9': ['w', 'x', 'y', 'z'],
+    '*': [' ']
+}
+
+def letter_phone(s):
+    if not s:
+        return []
+
+    digit_lists = [digits[digit] for digit in s]
+    combinations = [''.join(combo) for combo in product(*digit_lists)]
+    return sorted(combinations)
+
+# Example usage
+s = sys.argv[1]
+out = letter_phone(s)
+print("[" + ", ".join(f'"{item}"' for item in out) + "]")