#R, (削除) 47 (削除ここまで)(削除) 42 (削除ここまで) 41 bytes

write(rep(LETTERS,27)[-27*1:26],1,26,,'') 

Try it online!

Generates 27 alphabetes, removes 27-th letters and prints in 26 columns.

Improvement inspired by @Giuseppe's solution.

R, (削除) 47 (削除ここまで)(削除) 42 (削除ここまで) 41 bytes

write(rep(LETTERS,27)[-27*1:26],1,26,,'') 

Try it online!

Generates 27 alphabetes, removes 27-th letters and prints in 26 columns.

Improvement inspired by @Giuseppe's solution.

#R, (削除) 47 (削除ここまで) 42 bytes

Generates 27 alphabetes, removes 27-th letters and prints in 26 columns.

Improvement inspired by @Giuseppe's solution.

write(rep(LETTERS,27)[-27*1:26],'',26,,'') 

#R, (削除) 47 (削除ここまで) (削除) 42 (削除ここまで) 41 bytes

write(rep(LETTERS,27)[-27*1:26],1,26,,'') 

Try it online!

Generates 27 alphabetes, removes 27-th letters and prints in 26 columns.

Improvement inspired by @Giuseppe's solution.

#R, 47 bytes

Generates 27 alphabets and changes appropriate letters to newlines.

x=rep(LETTERS,27);x[27*1:26]='\n';cat(x,sep='')

#R, (削除) 47 (削除ここまで) 42 bytes

Generates 27 alphabetes, removes 27-th letters and prints in 26 columns.

Improvement inspired by @Giuseppe 's solution .

write(rep(LETTERS,27)[-27*1:26],'',26,,'')