"A minimalist pencil sketch capturing the atmosphere of Miguel de Unamuno's Sis (La niebla). The image should evoke a sense of uncertainty and indecisiveness. A foggy environment, with dense mist and indistinct silhouettes, should symbolize the characters' internal questioning and existential search. The characters should not be fully defined; their outlines or shadows can blend with the fog, creating an abstract and ethereal effect. The philosophical depth of the novel and its search for meaning should be reflected in the ambiguity and abstraction of the image. Black and white tones, combined with soft shadows, should capture the tense and gloomy atmosphere of the novel. The design should avoid excessive detail, opting for a simple yet meaningful composition." --ar 3:4