In a certain language ‘PAPER’ is written as ‘UFUJW’. Then how ‘MOURN’ is coded?

In a certain Language PALE is written as 2134 and EARTH is written as 41590 then How PEARL is written as____.

If HEALTH = IDBKUG then HOSPITAL = ?

In a certain code language 'CAT' is written as 'DDY'. How will 'BIG' be written in that code? 

In a certain code, COLD is coded as GSPH, then how is NOT coded in the same way?

If DON is coded as 345 and ROAM is coded as 6412, then how will RANDOM be coded?

In a certain code language, 'ROBST' is written as 'QPYLO' and 'POLAR' is written as 'OXILM'. How will 'GUJRT' be written in that code language? 

In a certain code language, 'GAMBLE' is coded as '864321', and 'PLAY' is coded as '7265'. How will 'LAMB' be coded in that language?