val targetKeywords = listOf("red", "blue", "yellow", "white", "black")
val inputData = listOf(
    "one blue",
    "two gray",
    "three black",
    "four blue",
    "blue",
    "five yellow",
    "six gray",
    "yellow",
    "seven black",
    "nine gray",
    "ten blue",
    "purple"
)

val resultMap = targetKeywords.associateWith { mutableListOf<String>() }
inputData.forEach { item ->
    targetKeywords.forEach { color ->
        if (item.contains(color)) {
            resultMap[color]!! += item
            return@forEach
        }
    }
}

print(resultMap)
// result: {red=[], blue=[one blue, four blue, blue, ten blue], yellow=[five yellow, yellow], white=[], black=[three black, seven black]}