Permutations And Combinations

Let b₁b₂b₃b₄ be a 4-element permutation with b_i \(\in\) {1, 2, 3, ........, 100} for 1 \(\le\) i \(\le\) 4 and b_i \(\ne\) b_j for i \(\ne\) j, such that either b₁, b₂, b₃ are consecutive integers or b₂, b₃, b₄ are consecutive integers. Then the number of such permutations b₁b₂b₃b₄ is equal to ____________.