Generate a music composition prompt according to low valence and low arousal levels based on the given ABC musical notation:

Create a mournful and pensive composition evoking a sense of deep sorrow and contemplation. Craft a melody that conveys a feeling of melancholy and introspection, capturing the essence of a heavy heart and subdued emotions. Your composition should resonate with a somber atmosphere, reflecting a state of sadness and reflection. Let the music express the depths of sorrow and introspective thoughts through gentle and emotive melodies.