[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a potassium salt and a hexacyanoferrate(4-) salt."}, {"from": "gpt", "value": "[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[K+1].[K+1].[K+1].[K+1].[Fe+2]"}]