Project in Linked List C programming

Hey everyone, I have an assignment to make and I need help with it so I'm putting here what I need for you to understand. Basically I need a C program for a double linked list. The user will input a string that handles (word)_#_(year)_#_(definition)_#_(SYNONYM) ex: invest_#_2009_#_trade_#_EXCHANGE Now the user can input a string like this below. ex: desert_#_2002,_2008,_2003_#_wasteland,_wilderness_#_DESERT,_SAHARA so first of all what I'll need is to split the string into char word which contains the word, int year, char definition and char synonyms. No i have a few conditions for that string which are right below: - Word has to be in lower case letters - Year has to be a positive number - Definition has to be in lower-case letters - Synonyms has to be in UPPER-CASE letters So if these conditions are there then i need to print "Not legal" and continue with my linked list Now for my linked list: I have to build a linked list that stores the string and the word of course and basically I need my linked list to have the following options: - Adds a new word to the dictionary (including everything) - Deletes a word in the dictionary (like: what word do you want to delete? user inputs the word and it deletes the whole string) - Sort the words in alphabetical order - Prints all the words only (not with their definition etc...) - Searches for the word - Searches for the year and gives all the words the year relates to - Searches for the definition and gives all the words the definition relates to - An option that prints all the definition pairs (look above) so if let's say I have inputted the following words: devoted_#_2003,_2001,_2008_#_worship_#_AHAVA desert_#_2002,_2008,_2003_#_wasteland,_wilderness_#_DESERT,_MIDBAR love_#_2001,_2008_#_adore,_worship_#_AHAVA test_#_1999,_1907_#_exam,_check_#_TRIAL,_INVESTIGATION,_DESERT You'll see that devoted and love have the same definition. *Please make sure that all words have to be in alphabetical order at all times.