function task(lineCount = 5) {
  const lines = []

  for (let i = 0; i < lineCount; i++) {
    const decades = 10 * i

    const line = Array.from({ length: 10 }, (_, index) => {
      const number = index + 1
      return decades + number
    })

    lines.push(line)
  }

  const resultString = lines
    .map(line => {
      return line
        .map(String)
        .map(string => string.padStart(2, "0"))
        .join(' ')
    })
    .join('\n')

  console.log(resultString)
}

a
b
c
a+a
b+a
c+a
a+b
b+b
c+b
a+с
b+с
c+с
ab+a
ab+b
ab+b