BL is а 32-yeаr-оld mаle with nо knоwn allergies who presented for evaluation of a large sore on his skin. He states that it appeared 2 weeks ago. An RPR was performed and demonstrated a titer of 1:128. A treponemal EIA demonstrated reactive syphilis IgM/IgG. The doctor diagnoses this as a gummatous lesion correlating to tertiary syphilis. All CSF parameters are normal. What is the best treatment regimen for this patient?