In a certain code language, 'CAST’ is written as '311920', and 'FEED' is written as '6554'. How will 'GLAD' be written in that language?

Let's find the positional values of the letters in the English alphabet ($\text{A}=1,\text{B}=2,\dots ,\text{Z}=26$):For CAST:$\text{C}=3$$\text{A}=1$$\text{S}=19$$\text{T}=20$ Combining them directly gives 311920.For FEED:$\text{F}=6$$\text{E}=5$$\text{E}=5$$\text{D}=4$ Combining them directly gives 6554.For GLAD:$\text{G}=7$$\text{L}=12$$\text{A}=1$$\text{D}=4$ Combining them directly gives 71214.