Crear cuenta
empaquetar([1, 1, 1, 3, 5, 1, 1, 3, 3]) # [(1, 3), (3, 1), (5, 1), (1, 2), (3, 2)]
empaquetar([1, 2, 3, 3, 3, 1]) # [(1, 1), (2, 1), (3, 3), (1, 1)]
empaquetar([1, 1, 1, 1]) # [(1, 4)]
empaquetar([1, 1, "a", "a", "s", "s"]) # [(1, 2), ('a', 2), ('s', 2)]
empaquetar([]) # []
countNumbers("la casa!!"); # 0
countNumbers(""); # 0
countNumbers("la c3asa!!"); # 1
countNumbers("0la c9asa!!"); # 2
countNumbers("125"); # 3
countNumbers(12345); # 5
countNumbers("la casa!!"); // 0
countNumbers(""); // 0
countNumbers("la c3asa!!"); // 1
countNumbers("0la c9asa!!"); // 2
countNumbers("125"); // 3
countNumbers(12345); // 5
countFirstElement([4,3,2,5,4,6,4,3,0]) # 3
countFirstElement([4,3]) # 1
countFirstElement(["a", "b", "b", "a"]) # 2
countFirstElement([]) # 0
