Hard coded inputs to mixed_keyword cypher (#1500)

* Update morse_code_implementation.py

* Delete porta_cipher.py

* Update mixed_keyword_cypher.py

* Mixed keyword cypher added

* issue with mixed keyword fixed

* no math included

* hardcoded inputs

* porta cypher added

* porta cypher added

* commented in mixed keyword according to contrib.md

ciphers/mixed_keyword_cypher.py

@@ -0,0 +1,71 @@
+def mixed_keyword(key="college", pt="UNIVERSITY"):
+    """
+
+    For key:hello
+
+    H E L O
+    A B C D
+    F G I J
+    K M N P
+    Q R S T
+    U V W X
+    Y Z
+    and map vertically
+
+    >>> mixed_keyword("college", "UNIVERSITY")  # doctest: +NORMALIZE_WHITESPACE
+    {'A': 'C', 'B': 'A', 'C': 'I', 'D': 'P', 'E': 'U', 'F': 'Z', 'G': 'O', 'H': 'B',
+     'I': 'J', 'J': 'Q', 'K': 'V', 'L': 'L', 'M': 'D', 'N': 'K', 'O': 'R', 'P': 'W',
+     'Q': 'E', 'R': 'F', 'S': 'M', 'T': 'S', 'U': 'X', 'V': 'G', 'W': 'H', 'X': 'N',
+     'Y': 'T', 'Z': 'Y'}
+    'XKJGUFMJST'
+    """
+    key = key.upper()
+    pt = pt.upper()
+    temp = []
+    for i in key:
+        if i not in temp:
+            temp.append(i)
+    l = len(temp)
+    # print(temp)
+    alpha = []
+    modalpha = []
+    # modalpha.append(temp)
+    dic = dict()
+    c = 0
+    for i in range(65, 91):
+        t = chr(i)
+        alpha.append(t)
+        if t not in temp:
+            temp.append(t)
+    # print(temp)
+    r = int(26 / 4)
+    # print(r)
+    k = 0
+    for i in range(r):
+        t = []
+        for j in range(l):
+            t.append(temp[k])
+            if not (k < 25):
+                break
+            k += 1
+        modalpha.append(t)
+    # print(modalpha)
+    d = dict()
+    j = 0
+    k = 0
+    for j in range(l):
+        for i in modalpha:
+            if not (len(i) - 1 >= j):
+                break
+            d[alpha[k]] = i[j]
+            if not k < 25:
+                break
+            k += 1
+    print(d)
+    cypher = ""
+    for i in pt:
+        cypher += d[i]
+    return cypher
+
+
+print(mixed_keyword("college", "UNIVERSITY"))