1 unit of ( C )
4 units of ( B )
1 unit of ( C )
1 unit of ( D )
1 unit of ( A )
1 unit of ( C )
1 unit of ( A )
3 units of ( A )
2 units of ( C )
3 units of ( D )
1 unit of ( C )
1 unit of ( A )
3 units of ( A )
3 units of ( C )
1 unit of ( D )