1355
The encoding is as follows
A^2 + B^2 +C^2 +D^2 +E^2
English alphabet is the key:
CHINA = 3 8 9 14 1 = 9+64 +81 +196+1 =351
JAPAN = 10 1 16 1 14 = 100 + 1 + 256 +1 +196 =554
NEPAL = 14 5 16 1 12 = 196+ 25 +256 +1 +144 =622
EGYPT =5 7 25 16 20 = 25 +49 +625 +256 + 400 = 1355