421 
moves, the
carriage return key
puts the bomb, the p key suspends;
2. With u, h, j, the k key moves, the n key puts the bomb;
3. With W, A, S, the D
key moves, the Q key
puts the bomb; 4. With the small keyboard
numeric keyboard 8, 4, 5, 6 migrations, the del key puts the bomb.