FIRST ALPHABET IS SECOND SPACE FORWARD AND SECOND ALPABET IS TWO SPACE BACKWARDS IN ALPHABET SEQUENCE OF A, B, C TO Z, and hence the series progresses further with this logic
FOR CANDLE --> C IS FIRST ALPHABET OF candle SO IT'S CODE IS E (OMIT D AND SECOND SPACE IS E), THEN A IS SECOND ALPHABET OF candle, SO IT'S CODE IS Y (FIRST BACKWARD ALPHABET OF A IS Z and THE SECOND backward SPACE IS Y and so on.
Hence for FLAMES
F = H (OMIT G FORWARD)
L = J (OMIT M BACKWARDS)
A = C (OMIT B FORWARD)