Sour Soup With Rice Noodles

• 4 black mushrooms
• 1 green onion
• 3/8 bamboo shoot tips (dried)
• 1,200 ml chicken stock
• 60 gr rice stick noodles
• 32 gr pork butt (boneless)
• 10 ml vinegar (white)
• 5 ml soy sauce (thin)
• 2 ml sesame oil
• 1 gr sugar