kotlin, 283 bytes

Result

WA

Duration

5479ms

Code [DL]

fun main() {
	var s = readLine()!!
	println(s)
	val r=Regex("T")
	for (i in 1..48) {
		readLine()
		println(r.replace(s,"."))
	}
	val p = r.find(s)!!.range.start;
	val t = readLine()!!
	val l = p-Regex("K").find(t)!!.range.start+1;
	println(Regex("K").replace(t,"K"+".".repeat(l)))
}

stdin

                T                                 
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
         K                                        

stdout

                T                                 
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stderr

OpenJDK 64-Bit Server VM warning: Options -Xverify:none and -noverify were deprecated in JDK 13 and will likely be removed in a future release.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.intellij.openapi.util.JDOMUtil$2 to constructor com.sun.xml.internal.stream.XMLInputFactoryImpl()
WARNING: Please consider reporting this to the maintainers of com.intellij.openapi.util.JDOMUtil$2
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Exception in thread "main" kotlin.KotlinNullPointerException
	at CodeKt.main(code.kt:10)
	at CodeKt.main(code.kt)

strace