common_elements_dict

my_dict = {
    "A":"K",
    "B":"D",
    "C":"A",
    "D":"Z",
}

b=[]
#function declaration
def common_elements(my_dict):
    for keys in my_dict:
        #check the dictionary values
        for items in my_dict[keys]:
        #if the values are foundin the keys append it to list b
            if items in my_dict:
                b.append(items)
            #print a sorted version of b
    print(sorted(b))


common_elements(my_dict)