import sys
fn=sys.argv[1]
size=sys.argv[2]
dfh=open(fn,'r')
rfh=open(fn+'+-'+size+'.bed','w')
for i in dfh:
	line=i.split()
	rfh.write(line[0]+'\t'+str(int(line[1])-int(size))+'\t'+str(int(line[2])+int(size))+'\n')