Dear R experts

Sorry for posting:
I have text file that I need to read into R (this is out from different
program).   A portion of  data look like:

;example data
1_1 ch1 0.0
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_2 ch1 0.1
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_3 ch1 0.1
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_4 ch1 0.2
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_5 ch1 0.2
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_6 ch1 0.3
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_7 ch1 0.3
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_8 ch1 0.4
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_9 ch1 0.4
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_10 ch1 0.5
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_11 ch1 0.5
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHAHHHH
1_12 ch1 0.6
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHHHHHH
1_13 ch1 0.6
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHHHHHH
1_14 ch1 0.7
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHHHHHH
1_15 ch1 0.7
HAAAHHAAAHHAAAAAHHAHHAHAHHHAAHHAHAAAAHAAAHHAHHAAHAHHAAAAHAAAHHHAAAHHAHHHAAAHHHHAHHAAHAAAAHAHHHHHAAAHAHHAHHHHAHHHHHHHHHAAHAAHHHAHAAAAAHHHHHHAHHHHHHHHHH

 read_data <- read.table ("my_text_file.txt",header=F,comment=";")
How can I read this into table where columns first five column are
maintained as such (e.g. 1_1  ch1  0.0 H ) where as the long single column
(filled with A, H, B) split into individual columns. Or alternatively first
read using the following command and then able to split the variable 4.

Thank you for help;


Ram H

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