regex: (arm|back|ch(eek|in)|e(ar|lbow|ye)|h(air|ead|ip)|knee|l(eg|ips)|mouth|t(eeth|ooth))
infile: c:\temp\\mars.txt
(arm,mars.txt,1): The monster had three arms and five heads, a combination normally

(cheek,mars.txt,4): He was similar to humans in that he had two cheeks and one chin,

(chin,mars.txt,5): but his chin was very long, longer than Jay Leno's, 

(leg,mars.txt,6): resembling a leg more than a chin, and as for his back it was 

(hair,mars.txt,7): indescribably hairy, a characteristic feature of those who lived

(eye,mars.txt,10): He had 25 eyes, 2 legs, 2 knees, one tooth,

(elbow,mars.txt,11): and two elbows like most people who live on earth.

infile: c:\temp\\she.txt
(arm,she.txt,2): She had slender arms and legs. She had pouting lips.

(cheek,she.txt,4): She had rosy cheeks and a very small chin. Oh, she

(hair,she.txt,5): also had red curly smooth hair, and a slightly tapered

(mouth,she.txt,6): mouth. 

(teeth,she.txt,8): When she smiled one could see white teeth.

infile: c:\temp\\age.txt
(arm,age.txt,2): His arms and legs were thin from not eating.

(eye,age.txt,3): His eyes seemed to protrude out of their sockets.

(hip,age.txt,5): Leaning to one side, one hip seemed to be missing.

(tooth,age.txt,6): A single tooth protruded from his mouth.

(cheek,age.txt,8): Finally, he had hollow cheeks and a sharp chin.

(lips,age.txt,10): his lips being cracked and parched.