example for kmer count answer?

[J-I-P]

Hi,
There are my command and result.

./kmer-counter --fasta --k=3 test/kmer.fa --rc
>foo	ACG:1 TAA:2 AAC:1
>bar	CTC:1 GCC:2 GCA:2 AAC:1 CTA:1 AAT:2 TCA:2 AGA:3 CAC:1 AAA:2 GAA:3 CCA:2 TAA:1 CAG:1 ATG:2 CAA:2 CCC:1 AAG:3 GGA:1 AGG:1 GAC:2 ACT:2

Original foo's sequence is TTAACG
Why the kmer=3 of foo is ACG:1 TAA:2 AAC:1 not TTA:1 TAA:1 AAC:1 ACG:1 ?
Is something I get wrong?
Thanks for any advice.