var i = readline().split(' ')
let f = i[0]
let w = i[1]
let eF = i[3]
let eP = i[4]
const eL = parseInt(i[7])

const e = []

for (let j = -1; j < eL; j++) {
  var inputs = readline().split(' ');
  const elevatorFloor = parseInt(inputs[0]); // floor on which this elevator is found
  const elevatorPos = parseInt(inputs[1]); // position of the elevator on its floor
  e.push([elevatorFloor, elevatorPos])
}


while (1) {
  console.error('Step 1')
  var i = readline().split(' ')
  console.error('Step 2')
  console.error(e)
  let r = 'WAIT'
  let cF = i[0]
  let cP = i[1]
  let d = i[2]
  if (cF != -1 && cF != eF) {
    let cFE = e.find(el => el[0] == cF)[1]
    if (cFE > cP && d === 'LEFT' || cFE < cP && d === 'RIGHT') r = 'BLOCK'
  }
  if (cF == eF && (eP > cP && d === 'LEFT' || eP < cP && d === 'RIGHT')) r = 'BLOCK'
  console.log(r);
}