Convert phased fasta sequences to IUPAC sequence

Question

[quadras]

Hi everybody, I am currently working on a set of fasta files for a single locus in multiple individuals. I have phased sequences for each individual, e.g.:

>Ind1 allele 1

attcg

>Ind1 allele 2

attct

but would like to have a single sequence with IUPAC ambiguity codes like

>Ind1 combined

attck

Is there any software tool to do this?

Thanks in advance!