$ OUT=$(LANG=en_US.UTF-8 smenu -c -e 2 -E'/(1+)/(\1)/g' -n 15 \

> t0015.in)

 1   2     3       4     5     6     7     8     9     10    11    (1)2  13 ▶
0:20 1:07 2:07 3:07 5:24 6:24 7:24 8:24 9:24 67:24 68:24 69:24 70:24 71:24 76:20 
 28  29    30      32    33    34    35    36    37    38    39    40    41 ▶
0:20 1:24 2:24 3:24 5:24 6:24 7:24 8:24 9:24 19:24 20:24 21:24 22:24 23:24 76:20 
 53  54    55      56    57    58    59    60    61    62    63    64    65 ▶
0:20 55:24 56:24 57:24 58:24 59:24 76:20 
 77  78    79      80    81    82    83    84    85    86    87    88    89 ▶
0:20 31:24 32:24 33:24 34:24 35:24 76:20 
 101 (1)02 103     104   105   106   107   108   109   110   111   (11)2 113▶
0:20 5:24 6:24 7:24 8:24 9:24 67:24 68:24 69:24 70:24 71:24 76:20 
 119 (1)20 (1)2(1) (1)22 (1)23 (1)24 (1)25 (1)26 (1)27 (1)28 (1)29 130   131▶
0:20 5:24 6:24 7:24 8:24 9:24 11:24 12:24 13:24 14:24 15:24 16:24 17:24 19:24 20:24 21:24 22:24 23:24 25:24 26:24 27:24 28:24 29:24 31:24 32:24 33:24 34:24 35:24 37:24 38:24 39:24 40:24 41:24 43:24 44:24 45:24 46:24 47:24 49:24 50:24 51:24 52:24 53:24 55:24 56:24 57:24 58:24 59:24 61:24 62:24 63:24 64:24 65:24 76:20 
 137 138   139     140   141   (1)42 143   144   145   146   147   148   149▶
0:20 31:24 32:24 33:24 34:24 35:24 76:20 
└━━───────────────────────────────────────────────────────────────────────────▶
0:20 1:20 2:20 3:20 4:20 5:20 6:20 7:20 8:20 9:20 10:20 11:20 12:20 13:20 14:20 15:20 16:20 17:20 18:20 19:20 20:20 21:20 22:20 23:20 24:20 25:20 26:20 27:20 28:20 29:20 30:20 31:20 32:20 33:20 34:20 35:20 36:20 37:20 38:20 39:20 40:20 41:20 42:20 43:20 44:20 45:20 46:20 47:20 48:20 49:20 50:20 51:20 52:20 53:20 54:20 55:20 56:20 57:20 58:20 59:20 60:20 61:20 62:20 63:20 64:20 65:20 66:20 67:20 68:20 69:20 70:20 71:20 72:20 73:20 74:20 75:20 76:20 77:20 78:20 
$ 

$ echo ":$OUT:"

:1:

$ exit 0