Láv on the MÁV

The boy is waiting at the train station when he notices the girl. He sits beside her, but can't start a conversation. Later, they see each other again through the train window. The boy asks for her phone number, but misses the last two figures as the girl's train is already on the way. Next day, following his friend's advice, he decides to call all the possible one hundred combinations believing that one would be her's.