A simple COBOL template.

Cobol.cbl

000100*AAAABBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBIIIIIIII
000150*Format lines:
000151* awk -i inplace '{printf("%04d00%s\n", NR, substr($0,7,120)) }' main.cbl
000160*Compile and run:
000161* cobc -x main.cbl && ./main
000200 IDENTIFICATION DIVISION.
000400  PROGRAM-ID. hello.
000500  AUTHOR. JULIA.
000600  DATE-WRITTEN. 2024-04-14.
000700  DATE-COMPILED. 2024-04-14.
000800  REMARKS. This is a pretty good COBOL program.
000900*
001000 ENVIRONMENT DIVISION.
001100  CONFIGURATION SECTION.
001200   SOURCE-COMPUTER. Ubuntu_Linux_x64_20_04_6_LTS.
001300   OBJECT-COMPUTER. Ubuntu_Linux_x64_20_04_6_LTS.
001400  INPUT-OUTPUT SECTION.
001500   FILE-CONTROL.
001600   I-O-CONTROL.
001700*
001800 DATA DIVISION.
001900  FILE SECTION.
002000  WORKING-STORAGE SECTION.
002099*Local storage is re-allocated each time a program is called.
002100  LOCAL-STORAGE SECTION.
002200  LINKAGE SECTION.
002298*Report and screen section not available with IBM Cobol x86
002299*Commented to avoid compilation warning
002300* REPORT SECTION.
002400  SCREEN SECTION.
002500*
002600 PROCEDURE DIVISION.
002600     DISPLAY "Hello, world!".
005000     STOP RUN.