typedef struct DLLItem {
    char *payload;
    struct DLLItem *next;
    struct DLLItem *prev;
} DLLItem;

typedef struct {
    int count;
    DLLItem *head;
    DLLItem *tail;
} DLL;

DLL *makeDLL();

void addDLLHead(DLL *dllC, char *data);

char *removeTail(DLL *dll);

void printDLL(DLL *dll);

void freeDLL(DLL *dll);