Shell Programming and Scripting

#!/bin/sh
for f in *.1a
do
printf ">Reference1a\nTTGATGTGCCAACTGCGCAAATAGCAGCAGCACTACCAGGACCTTCGCCCA\n" | cat - ${f} > Converted${f}
done
for i in *.1b
do
printf ">Reference1b\nTTGATGTGCCTACCAGGACCTTCGCCCA\n" | cat - ${i} > Converted${i}
done
for e in *.3
do
printf ">Reference3\nTTGATTCGCCCA\n" | cat - ${e} > Converted${e}
done

awk 'FNR==1{f="Converted"FILENAME; printf p>f} {print>f}' p=">Reference1a\nTTGATGTGCCAACTGCGCAAATAGCAGCAGCACTACCAGGACCTTCGCCCA\n" *.1a
awk 'FNR==1{f="Converted"FILENAME; printf p>f} {print>f}' p=">Reference1b\nTTGATGTGCCTACCAGGACCTTCGCCCA\n" *.1b
awk 'FNR==1{f="Converted"FILENAME; printf p>f} {print>f}' p=">Reference3\nTTGATTCGCCCA\n" *.3