廖沫沙

沫 = 末 + 氵 : Jehova's Witness (末) is taking a bath in the observatory's bathroom (o4) and Mahatma Gandhi (m) is adding a secret ingredient from a water bottle (氵) which causes the water to foam (沫) a lot. Jehova's Witness doesn't know though that the secret ingredient is Mahatma Gandhi's saliva (沫).

沙 = 少 + 氵 : Sherlock Holmes (sh) is selling bottles (氵) in front of the ashram (a1). Smiley (少) comes round because thon is very thirsty and buys a bottle, just to find out that it contains only sand (沙).