+grep "ATOM" structure${i}a.rebuilt.pdb > temps1
+grep "ATOM" structure${i}b.rebuilt.pdb > temps2
+
+awk -F "" '{print $1$2$3$4$5$6$7$8$9$10$11$12$13$14$15$16$17$18$19$20$21"A"$23$24$25$26$27$28$29$30$31$32$33$34$35$36$37$38$39$40$41$42$43$44$45$46$47$48$49$50$51$52$53$54}' temps1 > temps1a
+awk -F "" '{print $1$2$3$4$5$6$7$8$9$10$11$12$13$14$15$16$17$18$19$20$21"B"$23$24$25$26$27$28$29$30$31$32$33$34$35$36$37$38$39$40$41$42$43$44$45$46$47$48$49$50$51$52$53$54}' temps2 > temps2a
+
+
+cat temps1a TER temps2a > structure${i}.pdb