Find the hardest tongue twister.

Si Xiaosi and Shi Xiaoshi

Go to the market on April 14.

Si Xiaosi bought 44 Jin and 42 tomatoes.

Shi Xiaoshi bought 14 kg 42 filament.

Si Xiaosi wants to exchange 44 kilograms of 42 tomatoes for Shi Xiaosi's 14 kilograms of 42 filaments.

Shi Xiaoshi weighs 14 kg of 42 ounces of filaments instead of 4 kg of 44 ounces of tomatoes.

Xiao Si said that 42 tomatoes weighing 44 kg can increase nutrition and prevent myopia.

Shi Xiao said, I can weave silk, satin and silk at the same time.