for tripple in current_tripples:
        if tripple in existing_tripples:
            existing_contact_times[current_tripples.index(tripple)] += 1
        else:
            existing_tripples.append(tripple)
            existing_contact_times.append(1)

    contact_ended = False
    for tripple in existing_tripples:
        if tripple not in current_tripples:
            total_contact_times.append(
                existing_contact_times[existing_tripples.index(tripple)])
            contact_ended = True
            del existing_contact_times[existing_tripples.index(tripple)]
            del existing_tripples[existing_tripples.index(tripple)]