How many tripeptides can be prepared by linking the amino acids glycine,alanine and phenyl alanine?

" How many dipeptides are possible with amino acids glycine and "(+-)" alanine "

The number of tripeptides formed by three amino acids: glycine, alanine and serine is

The number of tripeptides formed by three amino acids : glycine, alanine and serine is :

The dipeptides which may be obtained from the amino acids glycine and alanine are

Amino acid alanine is

How many different tripeptides can be obtained from alanine, glycine and phenylalanine, each tripeptide containing all the three amino acids?

How many different tripeptides can be obtained from alanine, glycine and phenylalanine, each tripeptide containing all the three amino acids?