Concept:
Each letter is assigned a fixed digit based on given examples.
Step 1: From PAINT → 74128}
\[
P=7,\ A=4,\ I=1,\ N=2,\ T=8
\]
Step 2: From EXCEL → 93596}
\[
E=9,\ X=3,\ C=5,\ L=6
\]
Step 3: Encode ACCEPT.
\[
A=4,\ C=5,\ C=5,\ E=9,\ P=7,\ T=8
\]
\[
\Rightarrow 455978
\]
Hence, the encoded form is 455978.