In a code language, 'sky is blue' is written as 'mud pot sum', 'i like blue' is written as 'mud man log', and 'I am sky' is written as 'man red pot'.What is the code for the word 'is' in this language?

sum

Given; In a code language, 'sky is blue' is written as 'mud pot sum', 'i like blue' is written as 'mud man log', and 'I am sky' is written as 'man red pot'.

So,

SKY IS BLUE  =  MUD POT SUM

I LIKE BLUE  =  MUD MAN LOG

I AM SKY  =  MAN RED POT

As we can see the code for IS is SUM.