The coding pattern for "NOIDA" to "OPJEB" appears to be a letter shift by +1 in the alphabet for each letter:

• N → O
• O → P
• I → J
• D → E
• A → B

Applying the same logic to "DELHI":

• D → E
• E → F
• L → M
• H → I
• I → J

Thus, "DELHI" is coded as EFMIJ in that language