import re

def word_stuff(word,number):
    list_of_words=re.findall(r'[a-z,A-Z]+',word)
    new_list=[]
    for word in list_of_words:
        if len(word)>number:
            new_list.append(word[:number]+"...")
        else:
            new_list.append(word)
    return(new_list)


print(word_stuff("Welcome to _ CEICData. Welcome to BPA",4))