word_count to store the word count for each sender.max_count to 0 and max_sender to an empty string.messages and senders arrays simultaneously.
a. Split each message by spaces to count the words.
b. Add the word count to the corresponding sender's total in word_count.
c. If the current sender's total word count is greater than max_count, update max_count and max_sender.
d. If the current sender's total word count equals max_count, compare the sender's name lexicographically with max_sender and update if necessary.max_sender as the sender with the largest word count.