Given k sorted arrays of possibly different sizes, merge them and print the sorted output. Input Size : N<=100

I hope its a UI issue with result

Given k sorted arrays of possibly different sizes, merge them and print the sorted output.
Input Size : N<=100
Example:
INPUT
k = 3
1 3
2 4 6
0 9 10 11
OUTPUT
0 1 2 3 4 6 9 10 11

Code :

let one = userInput[0].split(" ")

let two = userInput[1].split(" ")

let three = userInput[2].split(" ")

// let str2 =userInput[1].split("").sort();

let newArr=one.concat(two,three).sort((a,b)=> {return a - b})

console.log(newArr.join(" "))

but testcase fails:
Input :

2
1 5
-5 11

Expected result : -5 1 5 11.

my result : -5 1 2 5 11.

Please rectify if my code is wrong