how to calculate key length in hbase?

[ch huang]

hi,maillist:
         i observe command " hbase hfile -m -f
/hbase/pipe_url/da8687017e0d5ef0a274153426127ef3/info/9efda5a9f07e47248af4e998b42afafd"
output ,and i do not know how to calculate the key length,

it's say
firstKey=2-F9150DB8A200991BCCA59B5D4E554181/info:url/1400052220386/Put

and
avgKeyLen=53

but
# echo 2-F9150DB8A200991BCCA59B5D4E554181|wc -c
35
# echo 2-F9150DB8A200991BCCA59B5D4E554181/info:url/1400052220386/Put|wc -c
62
none match the number 53,why?